Problem with laptop modem

Hi to all.
I’ve just installed OpenSuse 11.0 on a Toshiba Satellite S1410 laptop. I’ve configured an internet connection using the internal modem (Toshiba Software Modem) and I’m having a problem. Kinternet dials the first 4 digits (I can hear them on speaker) and them drops down the call. When I check the log, it says that the line is busy… I´m a Linux rookie, so I’m a little clueless about what I’m supossed to do to correct this problem.
Any help would be really appreciated.
thanks in advance
Marco Antonio