SonicWall PRO 2040 Standard VPN

I just started working here and ive never had experience with a
SonicWall before but I am having a ton of trouble getting VPN to work
on it. Aparently the users here can VPN but only using the Sonic VPN
client.

We are now instituting Palm Treo 700w's from Verizon here and we need
to be able to connect via VPN to the network to allow an application to
run on the phones.

Looking at the logs, the SonicWall is receiving the requests and is
passing both phases of authentication. Then, the connection just halts
and the logs show that the connection was dropped.

SonicWall's documentation is terrible and shows no information about
this. Google doesnt return much to work with either.

Has anyone been able to get a SonicWall VPN to work correctly? If so,
please let me know if your willing to help me out.

Thanks

Bryan