Netmeeting Problem

[Doomsday123]

I am trying to use netmeeting to remotly connect to a friends machine so i can clean her computer up a bit using desktop sharing. I was able to do it like a week ago but now when i type in her IP and call it says she is not allowed to accept netmeeting calls and when she types in mine and calls it tells her the same thing... Anyone have a clue what is going on? she has sbc yahoo dsl and i have comcast cable. THanks

*oops might have posted in the wrong forum, if it needs to be moved please move it. No harm intended*