Unable to use Reliance usb moden in Vista ultimate...

Question

I tried to use the reliance USB modem
The sodt ware is instaled
Unable to get connected inpite of the fact that sugnals are shown
message: the device is either not avilable
the device manager shows that he device is working normally
modem querry indicates that modem is working and is functioning normally
pl advice to get my wireless modem functiong on my desktop
thanks
DR GR Prasad