How to tell if a new scan disk is bad

First you going to need to answer a bunch of questions. You need to give the make model and year of the car you're trying to play these on. Second, what are you using to play the files (your cell phone, an iPod type device, or you loaded the files into the hard drive of the radio itself (mostly found on Dodge Chrysler vehicles)

Use Windows Media Player on the 'WMA' file to burn an "audio disk" -- use a CD-RW ("rewritable") disk. Then, use any program to read from the disk, and to create an MP3 file.

Are you writing a "data" CD, with many MP3 files,
or are you using Windows Media Player to burn a "music" CD?
Windows Media Player will convert the MP3 files back to WAV files.

The CD-reader in your car cannot read MP3 files -- it can only read WAV files -- commercial CDs are written as WAV files.

When you put the CD into your computer, how many megabytes of the disk are "used", and how many "tracks" are there on the CD?

check the file types from you music the shaker only plays MP3 and PCM WAV  file types. You may have WMA (if u used windows media player) which will not play on the shaker  (i had this same ploblem btw) you can easly find free music file converter software to change these files to mp3 or wav types (which i did), or you could rerip to songs from a cd and tell the windows media player to rip the files as mp3 types instead of the default wma format  from the windows media player widow :
tools >> options >> Rip Music >> under format select mp3 (theres a wav option but i used the mp3 option to be safe) 
do not use the sync feature it will automatically convert your files to to wma (why? i dont know) instead copy the files directly from the folder that contains them :
right click the file you need to put on the player select open file location drag and drop to the player (or copy/paste if you want).
hope this helped =P 

1. songs which have copyright protection on aren't recognised by the player
2.you can't convert from WMA to MP3
3. you can't drag and drop from a CD you have to rip it first. i suggest you use windows media player for this as it is very quick you just put in the disk and click 'RIP'
4. you can down;load the latest media converter from the philips website which will actually convert things
5. try upgrading the firmware (from the philips website) you need to download the new device manager and then follow insructions from the web page
6. try reparing your device using the new device manager (it will delete anything you have on there

Connect your player to the USB port on your computer using the USB connector on the Mix Max. A 'MIX-MAX' window will appear in your My Computer folder which is the player's internal memory. To add more files and songs to your player simply drag and drop MP3 or WMA files from anywhere on your computer into the 'MIX-MAX' window.

For Windows XP, you can utilize Windows Media Player 10 software to convert music on an audio CD into MP3 or WMA format as follows:

Open the Windows Media Player 10 Browser, then click on the 'Rip' icon on the top tool bar. Insert a Music CD into the CD-ROM drive of your computer.
Click on the 'Tools' menu option at the top menu bar, then click on 'Options'; the Option setting menu will appear. Click on Rip Music and set the Rip music to the desired location on the newly ripped music (MP3 format or Windows Media Audio format). Adjust the audio quality as desired. When finished, click 'OK' to confirm the settings.
Click on the 'Rip Music' icon to start ripping the music to your computer.
When the music tracks are ripped; connect the player to your computer. Open the 'MIX-MAX' window and open the ripped music location window.
To add the transferred/ripped music file/songs to your player simply drag and drop the MP3 and/or WMA files into the 'MIX-MAX' window.
When the files are finished loading into the player, follow the 'Safely Remove Hardware' procedure as shown below.
Note: For Windows 98SE, Windows ME, and Windows 2000, please use the Windows Media Player 9 to convert music on an audio CD into MP3 or WMA format.

Downloading WMA files with DRM using Windows Media Player 10 (for Windows XP)

To download WMA files with DRM, follow the procedure described below using the previously installed Windows Media Player 10. Before beginning the procedure please turn the unit on and connect the unit to the computer as previously described.

Open the 'Windows Media Player Browser 10' and click on 'Sync'.
Click on the 'Sync List' pull-down menu to locate the music files you wish to download. Then make sure to click the box next to the files.
Select the Portable Device that you want to copy to from the right side drop-down menu. Click 'Start Sync' to start downloading the WMA file(s) with DRM to the Portable Device.
After finished downloading all the desired files to your unit, follow the 'Safely Remove Hardware' procedure as shown below.
Note: For Windows 98SE, Windows ME, and Windows 2000, please use the Windows Media Player 9 to download WMA files with DRM to your player.

Yes, you can, although using Window Media Player to transfer/sync is very slow. It is essential to use Windows Media Player if you want to transfer licenced .wma files but it is quicker to just drag & drop the files in Windows.

(.wma files are like mp3s but use a different encoding method)

If you are happy to take the slow route using WMP, (or you need to use WMP to transfer .wma files) then connect your player to the computer by USB, open WMP & click "Sync". Your player should show & you can add files to it in this window.

For quicker file transfer, just locate your connected mp3 player (Start/MyComputer) then copy & paste, or drag & drop files or folders onto it.

Hope this helps!