Hi,, sounds like you are in a situation where i once found myself,,you can try this link,, and this driver,, however???
As Per Epson:
Windows XP Support for Epson Scanners
Question: What Epson Scanner products are automatically supported in Microsoft's new Operating System, Windows XP?
Answer: There are no built-in drivers for Epson Scanner products in Windows XP.
Question: Which Epson Scanner product drivers will be made available for download from the EPSON Support website?
Answer: The following scanner drivers are or will be made available for download from EPSON Support web site. Please check in the download section for your model for current availability. We are targeting to have these drivers finalized and posted on the web by mid November.
Perfection 1200U PHOTO**
Perfection 1240U PHOTO*
Perfection 1250 PHOTO
Perfection 1640SU OFFICE
Perfection 1640SU PHOTO
Perfection 1650 PHOTO
Perfection 2450 PHOTO
* These products do not have digital signatures by Microsoft WHQL Windows Hardware Quality Labs). No WIA (Windows Image Acquisition) support.
** This product supports WIA, but does not have digital signature by MicroSoft WHQL.
*** Digital signature support for USB and SCSI only. IEEE 1394 connection supported in Win XP but unsigned by WHQL.
might be time for a new purchase??