Truclient reply issue

Hi All,

I am preparing truclient script in LR12.53 using mozilla FF. I am trying to replay the script but script was not replaying from browser. Intially its working fine after some time i am unable to reply the script. But i am able to run individual steps and running from vugen successfully. Previously also i am facing same issue at that time i am reinstalling my vugen. But every time re installing is not the solution. So pls help me about this issue.