Joe,
Thanks for the prompt response.
To answer your questions:
1. The dialog in the box is "Invalid Connection Information". As mentioned, once the connection dialog box is closed, that is where the message "The host you have specified must be a v9.x BIG-IP" appears.
2. I have verified that the correct IP address are being used. I have also tried to connect to a second LTM cluster running BIG-IP 10.2.2 Build 763.3 Final and I encounter the same issue.
3. I don't know of any other iControl clients but I can look for one and try to connect.
4. I am using Win 7/version 4 of .NET. I am going to try this from a system tomorrow running XP/3.5 and I'll post the results up.
Thanks,
Sean