The FB320P is a parallel port scanner and is having problems communicating with the computer. Are you connecting it directly to the parallel port on the computer? In that case, you may not have bi-directional communication enabled. Turn off the scanner and the computer and disconnect the data cable from the computer. Turn on the computer and enter the BIOS. (Press Esc, F1, F10, or Del repeatedly after you turn the computer. You should see a screen with the correct key to press; it varies depending on your BIOS and motherboard. If you miss the timing, shut down the computer and try again.) In the BIOS, search for the parallel port settings and see if you can enable bi-directional communication.
Not all parallel ports support bi-directional communication. If you can't enable the feature, you need a different parallel port. Try a PCI slot add-on card; just check the features and check the manual for enabling bi-directional communication.
If you are using a USB to parallel port adapter, get a different one that supports the bi-directional communication.
What OS are you using? There are a few that had ASPI driver issues; a third party app, ForceASPI, may help. See http://www.afterdawn.com/software/cd_dvd/dvd_tools/frcaspi.cfm
I hope this helps. Please add more information about the configuration (cable, OS, etc) for extra ideas to solve the problem.