VPN setup through TMG

Hi Guys,

I've been trying to configure client VPN access into a TMG server,
The VPN client is able to connect to the TMG server - no problem, but they are unable to access any other servers behind TMG.

I think part of the problem is that TMG is on a different IP network than the rest of the internal network.
The internal network is on 10.0.0.x while the TMG server is on 192.168.2.254 (internal), 192.168.1.4 (external)
There is a fail-over router between 10.0.0.1 - 192.168.2.254

The TMG server can access all Internal Network resources from 10.0.0.x  
We have a static route on the TMG server to the 10.0.0.x network.

In TMG remote access policy (VPN), I've configured a manual VPN range available to VPN clients of 10.0.0.230 - 240
When connecting with VPN to the TMG server, I am allocated an address from this range, which is correct.
But I am for example unable to ping / access server 10.0.0.23 which is a server on the internal network.

Any ideas will help!?