This is a common problem with Epson printers. The ink cleaning well is full - well the printer thinks it is, you need to reset the ink cleaning counter.
See if this answer helps
http://www.mendmy.com/answers.php?id=119473
or here
http://www.mendmy.com/answers.php?id=119296
or try the link in this answer
http://www.mendmy.com/answers.php?id=116367
in fact search for epson in this catagory and I'm sure you find an answer
PC Expert, April 2008