You may have the same problem I had.
There is a link that I followed to the dellf game that is for AFFILIATES and FAMILIES. It will give you codes that DO NOT WORK.
If you go to the standard, normal people link, the codes will work fine. (not those codes, the new codes the game will give you).
This link should work:
http://dell.eprize.net/dell/dellf/index.tbapp