Inmarsat Satellite VPN w/Cisco 871

Hi,I am unable to VPN thru my Cisco 871 router. Here is my setup:

Wan In: Satcom
Lan 1 out: Laptop 1
Lan 2 out: Laptop 2

When I connect direct to my Satcom, I can connect to my remote station. The Router assisgns a static IP for Laptop 2 via ACL. Please support me for the solution