OGM don't stop when I pickup telephone

Hi, Im trying with IVM and I find nice. But, I have a problem:

When a call is incoming the OGM begin to play. Its ok. But when

I pickup the phone OGM don't stop.

I configure OGM wih "Press # Hangup Inmediatilly" but Its not revolve

the problem.

I have IVM 3.04 (trial) with Us Robotics Sporter Voice 33.6 Faxmodem external

and Windows 2000 profetional.

Thanks !!!