Cannot send/recieve SMS messages (Sprint) Help!!

[steelbath]

every time I try sending a text message I get the following error...
a pop up saying "Your text message cannot be sent"
and a notification pop up at the bottom saying

"Text Messages Retry
*my message here*
Error Class : Teporary
Cause Code : SMS Org.D.

Message failed would you like to retry?"

and when I click yes, I get the same thing again.

So I keep wondering these questions....
Is this a problem with just my phone?
is it a problem with WM6?
Could it be because the phone was originally activated in another state? (I'm in florida and I believe the phone was used in california before I recieved it)

Any help/advice would be greatly appreciated.
Thanks!!! CHEERS!!