jaechamp 0 Newbie Poster

Hello everyone please help me?
I'm not computer wiz but can get by. I'm using window xp professional with sp3 and ie 7. the problem is i'm trying to use nettalk but it keep saying the line is busy or invalid session description. I'd use this nettalk on my computer before now it' not working. My router is Huswei SmartAX MT880 (new version) on the NAT setting doesn't hvae redirect for portforward at all. This version has only DMS an virtual server. my speaker is working fine. can anybody help me please. You can send me shaunnai@hotmail.com thank you.