Dell v515w will not print color

Hello:

I have a Dell v515w 4-in-1 inkjet printer.  I use a black cartridge and one color cartridge.  Both cartridges have ink.  I have downloaded firmware, I have downloaded a driver (I think).  I have re-inserted both cartridges.  I have checked the box that says "use all available ink."  The printer still won't print color.  I noticed it about a month or so ago.  I don't use color often.  But I have a fax cover sheet that has color and last month I used it and noticed the color didn't print out.

Can anyone please help me find out the issue and help resolve it?  This has never happened before.

Thank you.