okay so i just got one last night, and i tried going on Windows Live & AIM and the other instant messaging services, but everytime i try to sign on .. it says "SERVICE NOT ENABLED FOR THIS HANDHELD"

i kept trying to sign in but it didnt work , and i tried to look up online how to fix it and nothign helped ]: the manual book thingy didnt say either..

how do i make it work? do i need to download something? and if i do or am supposed to, does it cost money to download?

[i have unlimited texting, so im not asking about the instant messaging charges..]

please help me if u know...!