Not sure if this will close this issue out or not but I think this is mostly solved for me now. I double and triple checked all of the setup parameters itemized by Joe. I had everything setup as he described but I still had the condition with the PTT opening before the FSK message had completed. I opened and closed N1MM (w/ MMTTY) and Microham Router several times and still no change. Finally, I closed all of the programs and rebooted the computer - problem solved, at least for now. Still not sure what caused the issue but I believe I am in good shape now.
Thanks for all of the comments and help.