VPN Client

Hello all,
 
I have an ISA server SP1, with W2K SP3, and the users have installed in
their computers the Firewall Client. 
 
When a user makes a VPN from his computer to another W2K server, and try
to make a telnet to Oracle MIS to port 1521, It doesn't run.
If the user deactivates the Firewall Client, then the Telnet works.  
 
What can I do so that the VPN, and the Firewall client work together?.  
 
Thanks.  
 
 

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