Beta 5 liveCD (kde): networkmanager and modem 3G

I’m trying to connect to internet with a huawei 172 usb modem using networkmanager, but it is not working. There is no error message, it simply disconnect as soon as I try to connect.
I made the same test with fedora 10 Preview (also in liveCD mode) and there the connection worked out-of-the-box.
It is very important to me to know if this modem will work in openSUSE 11.1 because this modem is my only connection to internet.
Any idea?

I found a bug report: