It is to do with the software built in to the printer and you can get a program to free your printer again (can get it of ebay for about £3 or if your patient enough google it you will find it sscserve.exe is the program i believe) you also need to open up your printer and clean the waste ink pads out dont just reset the printer or you will end up with ink leaking out of the bottom of your printer. Hope this helps.
Richard Smith, March 2006