-Uninstalled Java
-Installed 32-bit + 64-bit of latest Java version
-Deleted TU
-Re-downloaded a fresh copy of TU
-Removed password lock from my 4S
-Assigned "admin" + "XP compatibility mode" to TU
-rebooted Win7 PC + rebooted iPhone 4S
-Started TU, connected 4S to USB port (heard connection sound + auto-play window pops up).....
Tiny Umbrella still does NOT recognize my connected 4S device in the left panel.
I have a feeling this is an issue with TU.
Anyhow, I've all but exhausted this route. Not worth it anymore. Just going to wait for new 5.1 JB and will try it again at that time.
Thx to everyone for your help and for your suggestions.