Routing between multipule Tunnels

I want to  set up a spider topology with OpenVPN. OpenVPN server A has 
an OpenVPN tunnel to each of Servers B, C and D each with their own subnet.

The problem is that from Server B,C or D I can not communicate with any 
server other thatn A. From A however I can reach S,C and D and any 
station on their respective subnets. Also from a station on subnet A I 
can also get to B, C and D and also on their respective subnets.

For some reason I cannot get from one of the arms streight through the 
main server and back out again.

Does anyone know it this is not a workable topology or is there 
something else I need to do to make this fly.

MT



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