Hello again, everyone. Happy to report that all is well in the mower dept. It would seem that an MTD belt did in fact solve my problem. Lucky for me my local Lowes stocks the belt I needed. I took the brand new Gates belt off and compared it to the MTD belt. What I found was the MTD belt is slightly shorter, and I mean slightly shorter! Once I engaged the blades, I heard the sweet sound of the blades turning with a purpose. I was able to finally cut my grass!
Thanks to everyone who suggested this fix. I would never have guessed this as the solution, having used the "wrong" belt for so long.
The only downside to this is, while in town, my wife was "this close" to letting me buy another lawn mower. Guess that won't happen now! LOL!!
Thanks again, I am back to mowing the lawn regularly.