VPN 2nd network behind SOHO

[maclmu]

Hello,

i have a problem with an extension of our VPN network.

Till now we had a Firebox III at our main site connected to a remote network using a SOHO. Now we extend the SOHO network with a new network which can be reached thru a routing server.

The problem is, that i cannot to to the new network in either way.

Maybe this will help:

Server 1 : Net A
!
Firebox : Net A and Public
!
Internet
!
SOHO : Net B and Public
!
Switch : Net B
!
Switch : Net B
!
Server 2 : Net B AND Net C
!
Network : Net C

I can trace the following routes:

Net C -> Net B : Everything works
Net C -> Net A : Connection lost at SOHO
Net A -> Net B : Everything works
Net A -> Net C : Connection lost at Server 2 / Net B

I checked Server 2 using an IP trace and it routed the packages thru.

The routes itself seem to be allright since the packages get lost "on" their correct way.

Any ideas what to check?

Is this setup possible using a SOHO on the remote side?

Thanks for any idea!