VOIP Tunnel Configuration?

[Alex]

I bought a new notebook and installed the Z calls software where you can make PC to phone calls for cheap.when i double click the first time it opens.... But when i close it and try to reopen it it gives me a message that says 'VOIP TUNNEL CONFUGURATION and a number ... Coul anyone tell me how to get rid of this ?? and how can i use my pc to phone software??