I'm getting the same Code5, 145,55 error when trying to scan a document using my laptop via WIFI. I tested this with another laptop via WIFI and it scans just fine as well as when connected via USB. I'm able to print any document from my laptop via WIFI and the copy function works just fine as well. I reloaded my drivers and that didn't fix the problem. Any ideas?

Make sure the Lexmark OCR scan software is installed on your laptop. The software is available only on the installation disc that came with your printer. If you still haven't installed the software on your computer and you don't have the installation disc, please contact Lexmark Technical Support Center to request for one.
If you were able to scan documents before using your Lexmark printer, it could be just a slight communication issue. A quick fix for most communication errors can be achieved by resetting the printer and/or rebooting the PC. Simply disconnect the printer from your computer (if USB connected)> reboot your pc > unplug and re-plug the printer into the power source to reset it. When the printer turns on, reconnect it to your computer (if USB connected). Then try to print again once the computer fully recognizes the USB connection or when the WiFi light on the printer turns solid green (if WiFi connected.).

Issue The error message 'An error occurred while communicating with scanning device' appears on the computer running Windows XP.This error occurs while using the HP scanning software. If the error message appears on the computer while scanning from a networked product, click here to troubleshoot scanner communication errors for the networked product (c00897542) (in English). This document does not cover the communication error message on networked products. Solution Beforeproceeding with the solutions in this document, use the product to makea copy in order to make sure that the hardware is functioning correctly. Ifthe copy function does not work, this document will not help resolvethe issue. Search the HP Web site for a document covering the errormessage that appears on the computer while copying. Ifthe copy function works, try each of the following solutions in theorder presented. After completing the steps for each solution, test theproduct. If the product still does not work, then proceed to the nextsolution.
NOTE: Someof the following solutions require that the computer be restarted.Consider printing this page or creating a bookmark to it, so that itcan be referenced after restarting the computer. Solution one: Restart the All-in-One and the computer Follow these steps to restart the product and the computer.
NOTE: Make sure that the product is connected directly to an electrical outlet and not through a surge protector or power strip.

1. Turn the power to the computer off.
2. Press the power button () to turn off the product.
3. Wait 10 seconds.
4. Restart the computer.
5. Press the power button () to turn the product back on.
6. When the computer restarts, try the scan again.

• If these steps resolved the issue, you do not need to continue troubleshooting.
• If the issue persists, continue to the next solution.

Make sure the Lexmark OCR scan software is installed on your laptop. The software is available only on the installation disc that came with your printer. If you still haven't installed the software on your computer and you don't have the installation disc, please contact Lexmark Technical Support Center to request for one.
If you were able to scan documents before using your Lexmark printer, it could be just a slight communication issue. A quick fix for most communication errors can be achieved by resetting the printer and/or rebooting the PC. Simply disconnect the printer from your computer (if USB connected)> reboot your pc > unplug and re-plug the printer into the power source to reset it. When the printer turns on, reconnect it to your computer (if USB connected). Then try to print again once the computer fully recognizes the USB connection or when the WiFi light on the printer turns solid green (if WiFi connected.).

Your firewall block the communication. You will need to get into your protection software and allow 'full' access of MP Navigator (EXT)

I looked in on this and it says that an updated driver designed for windows 7 could fix the problem

Usually a firewall issue. I set-up 10-20 Xerox scanners per week and Vista is almost always a problem. Check Windows Firewall, and any other software firewalls you may have. Generally, once you find the firewall and create an exception rule, it will work. I have found ATT and AOL firewalls that had to be discovered by checking the ADD Remove programs in control panel to find them.

You can not scan with a M20i with an Ethernet cat 5 cable. It can ONLY be done via a USB or parallel cable.

If you don't believe me, which many on here wont accept the truth, here is the note from the Xerox documentation..

The WorkCentre can scan a document via Direct Scanning using a USB or Parallel Port connection only.

"hi have an archos 5, when trying to connect to wifi, keep getting "wifi error .(0)" or "wifi error .(21), i know i am in a wifi network area as my laptop and palm pda can connect ok, however the archos seems to keep scanning for networks until it eventually switches off, any suggestions would be greatly appreciated"

i have the same problem...PLEASE is there ANYONE who knows how to solve this issue.. my email is [email protected] i need desperate help..

thankyou

you can not scan usb, it has to scan via network cable via the scan card . you can use quicksetup utility to log in to the scan card and change the destination ip address of your tower. as long as your tower has a static IP sddress , should be applied via web interface of the scan card..

It sounds like you have setup a fax forward box.

You need to set up a one touch, scan to SMB.

this can be easily done via your web browser by typing in the IP address of the MFP and set it from there.

You need the IP address of the laptop and is best to put the shared folder in the main drive (C).
Then for the file path you just need to enter the name of the shared folder EXACTLY as it is on the lap top.
You also MUST enter the ID a password to give it access.