Facing issue during replay of a truclient script

Hi Friends,

We have successfully recorded one scenario from page A to page F using Truclient Firefox protocol. Without making any script change when we try to replay the same script it gives service unavailable error on page F, while traversing from page E to page F. If we put a break point before page F and then manually navigate to it through LR itself, it works fine. Has any one faced such type of issue before? Can you help me resolve this issue?

Regards,
Madhura