I have used a lot of SoftPhones but this one seems to be really good. But I have a problem and I hope someone can help me. When I call someone they cant here me but I hear them. But if they call my phone we will hear each other. I thought it was some kind of problem with my firewall but I have tested it on different computers with the same result. I have two phone operators i can choose from. And it is only with one of these phone oprerators I have the problem. How is that possible? Thanks in advance!