I'm able to connect to the VPN at my company (which I set up - it's a Windows
2003 Server Running VPN services) and  am able to Remote Desktop / Ping / Use
full Outlook just fine.

For a while.  

After a certain amount of time (usually 60 to 90 minutes) the VPN connection
will all of a sudden stop transmitting data.  According to an ipconfig I
still have an IP on the remote network, but all traffic ceases.  Outlook
reports that it has lost connection to the Exchange Server, ping tests fail,
no more remote desktop, dogs and cats living together... mass hysteria.

If I open up my Network Connections folder, the VPN Connection still shows
up as "Connected".  If I try to disconnect it, I get the "Attempting to
Disconnect from VPN" window, at which point it hangs (I've let this try to
disconnect for 2 hours at one point, with no results).  I can't close out of
that window unless I go into Task Manager and kill the explorer.exe process.  

Usually, I end up rebooting my machine every 60 to 90 minutes just so I can
reconnect to the VPN and resume my work.  As you can imagine, this is getting
annoying.  

Help please!

Thanks!

~ Nick