Oddsworld

I am using Express Talk version 3.10. The unlicensed Basic free version. Using this software, I am encountering two separate problems with it. 1. A number can be dialed, because it rings and is answered. But when I dial a callcenter, and when I have to make a selection of one of the numbers I can keep on pressing the numbers, but Expres Talk does not respond to it. I simply have to wait until an operator picks up. (It must be a config error, because when using different phone software it does work!) 2. When using Expres Talk after start up it works well. But after a while some telephone numbers can still be dialed, but some telephone numbers cannot. Expres Talk displays that the call is answered, but both sides cannot hear each other. And sometimes the other party hears me, but I cannot hear them. Please some advice on this. Thanks, Jim