I know this question may sound stupid, but....does it need a new ink cartridge?
Hi- if you press the menu or options button on your printer, there should be a clean ink cartridge option...
Also- did you remember to remove the protective film that covers the ink holes on your ink cartridge?
I forgot to do that once! 
Also, is the cartridge a recycled ink cartridge? I found that the really really cheap recycled ink cartridges at Walmart do no work in my printer. If you look at where the ink comes out on the cartridge they will look really worn out.
Ink cartridges can just come bad, and should be taken back to the store if that's the case. Be sure the protective tape is removed before installing it in the printer. There are some printers that won't print if even one of the cartridges is bad, so you may have to replace the color cartridge also before it'll work.
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