Put the maximium wait time in brackets after the exist so:
.exist(5) will only wait five seconds before moving on, if you do not specify a wait time I think qtp will wait your default sync time which is probably 25secs going by your example.
.exist(5) will only wait five seconds before moving on, if you do not specify a wait time I think qtp will wait your default sync time which is probably 25secs going by your example.

