Hi David,
Thanks for the information.
I guess if you remove this jrun4_58765.jar from the lib directory, it should work as this version of ColdFusion contains this fix.
So can you please remove this jar and try putting the security hotfix only and check if you encounter the same issue(http://helpx.adobe.com/legacy/kb/error-response-been-closed-illegalsta teexception.html).
Regards,
Priyank