TOAD Advisor Client/Server mismatch ?

TOAD advisor, advises that there is a mismatch between client/server - and in fact there is!

I can not get TOAD to play nicely with: 8i client to 8i server.
What is working is 10G client to 8i server.

When I attempt to use 8i client TOAD will through errors like:

Probe Timeout
Access Violations
Just hang until I kill it

Multiple starts, restarts, reboots - no go.

Anyone else experiencing similar ?