TP2 with Sprint - need info!

[matyana]

Dear All
As a first time HTC user, I dont hold guud hands on this luxury!
And thats the reason I am gonna ask a very basic sorta questions, so that i can start playing with it.
Actually i bought it on Ebay from a US seller (and i am in UK). And I asume it was used under CDMA technology. But now I am using with Orange netwrok under GSM or through Sim.
The problem i face are:
1)I can't access the "Sprint Navigation", it says connection error while my interent works perfectly.
2)I tried to install WM6.5 ...that was some Global Version.... but it failed....and now with WM6.1.....then i seen a post somewhere, saying i need upgrade from the original network company....! Anyways i went on SPRINT's website....but it says i need to Login into my account..... which i cant....coz Account is already registered by original seller and i do not hold any information on that!

WHat should i do? and where can i start? i know little bit about flashing coz i have done this with my Sony Ericsson phone. But i want little help to start with.

Many Thanks in Advance
regards