unknown

asked Jun 2, 2009 at 6:24am
Epson Epson Stylus CX5400

Epson CX5400 Ink Out Problem

We have had our Epson 5400 for a little while now and have had little to no problems till now.
A month ago I changed out my Cyan and Magenta inks(with Epson inks, that is all we use). They have printed well until this last weekend. All of a sudden it says the Magenta is out. I know it is still 80\% Full, but no matter how many times I take it out and shake it, unplug the printer, and put in a new ink it still says the Magenta is out. I even bought the cleaning kit from this site and ran some of it thru the nozzle. And of coarse I can't do a head cleaning with the machine saying an ink is empty.
What else can I do?? What is wrong?