Scheduler task run in Windows SBS 2011 Standard, was completed successfully but does nothing.

I have created a Scheduler task, was completed successfully but does nothing.

This task runs a Batch file and calls another program to Run.

This task when completes writes a log file and dont return any error to me.... But If I run the batch file manually it does what is supposed to do without any errors

Anyone helps me to solve this issue please.....................

Regards