Hi Bob,
Usually this happens when IPSec is being blocked in the middle, so in this case you might want to try both the IPSec/UDP and IPSec/TCP option. Also try assigning her another address and see what the counters are saying for encrypts and decrypts, try turing off all Split tunneling to make sure all traffic is coming through the VPN. The v3.5 clients should work no problem with the v3.6 Concentrator version. I think this is either a Routing or a Firewall issue.
Hope this helps,
Regards,
Aamir
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