Gordonkun :
why dont you try other voip apps?
He's right. You should try some out. As far as the connection issue, it probably is due to your internet. Have you tried wifi? DSL reports is a great site to look at for VoIP related products.
I currently use Global Call, which is pretty good, in terms of price. You can get bonuses that would never be offered by Skype or other popular brands which seals the deal for me. www.globalcall-1plus1.com for the promotion if you're interested. There was actually another thread about something similar, you should check out.
Relevant thread.
http
/www.tomshardware.com/forum/id-2104923/hear.html#13302981