Have an I-Rule from an old 9.X platform that is not working on 11.4.1 Causing connecteion reset errors. Any idea's ??/

The problem with the iRule is that is calling Big pipe commands/syntax. That is legacy from the 9.x code that you were running. In 11.4 with TMOS it will reject those commands and kill the iRule. You will have to remove and replace that old syntax with the current syntax for TMOS/tmsh if you want that same rule to work. There are not a lot of changes as iRule are based on TCL but there are a few and they can trip you up. Henrik did a good job of pointing out a few of them in your code. I would recommend looking for a new iRule that does the same thing that this one does. There are plenty here on DevCentral that may even do it a bit better.