[marcus_cruz]

Ok.. I know you used the search engine. So I will post why this occurs.
I had the same problem, and havig to configure your router is not the solution, albeit works, but potentially causes problem of various natures on your interneral network.
Reason: The network adapter that controls the Wifi 802.11 data and the adapter that controls the CDMA data, are the same and since your CDMA data needs a DHCP ip address the adapter will only use one setting, not both. This works as "it should" in the updated ROMS. Such as NRG's and Mighty's ROMS. I talked to sprint about this issue and they said it was a design decision. "Yeah right" in other words they meant "we goofed" our "business analyst" is a moron, and "we relay on the ppcgeeks.com website for all of our support issues". So just update to a ROM of your choice, and the issue will be solved.