Unlocked Nokia 6102 (cing -> att) internet problem

I did a search, and didn't find an answer for this, so if this is a repeat, i'm sorry.

I just got a Nokia 6102 unlocked (from Cingular to be able to use my old AT&T simcard), and i am not able to access the internet. I was able to on my old AT&T panasonic GU87, but am no longer able to. I spoke to Cingular cust care, and the guy said i needed to input a WAP address (which he gave me) but i can't find where to input it. Was the unlocking not done properly, or is there some other problem?

has anyone come across this previously, and can help me out? i need to be able to access the internet, and i am at a loss.

any help or advice would be greatly appreciated!!!
thanks...