Ok, I see no one has figured out my problem, However, I figured it out myself.
Let me explain! When I was running a complete test with DataSource, SoapRequest, Groovy script, Delay [1000], Mock Service, and the Dataloop as previously stated, the Mock service would continue to run and the test would just idle.
The solution: I pulled the Mock Service out side the Dataloop and adjust the delay accordingly. Not only did my loop continue but my Mock Service response undated outside the Dataloop and completed.
Hope this helps those with MockService problems.!!!!
Regards,
jtmartin