How to reset Supreme 20 booting in Mux Mode


I have ported Mux driver in win ce. Only alternative trials I am able to connect with the Wavecom. In the First trial I am able to connect, I reset the device and Wavecom Supreme, second trial i am receiving “mux test string” message and it is not connecting. Next time it is connecting similarly it is going on. I think in the second trial it is booting in Mux mode. Can any one suggest what could be the issue? IF booting in Mux mode is the issue then can any one say me how to reset it?

Advance Thanks