NetGenius and VPN clients often conflict with each other, as they are based on the same principle. Both VPN clients and NetGenius attempt to capture Internet traffic for processing, so when one application succeeds in doing so, the other one usually fails.
For example, if NetGenius captures Internet traffic first before a VPN client does, the VPN client may not see any data and disconnect. Likewise, if a VPN client captures Internet traffic first, NetGenius may not see any data and not record any activity.
Unfortunately there is no solution for this problem at the moment.