Windows 7 work station unable to run Scheduled Tasks.

We are trying to implement a relay service on a basic windows 7 machine.  The only thing the computer has is Windows and Crosstech (asset management & remote control software).  We set up a basic task to run a service, everynight at 6:30, when the computer is logged-off.  As far as we can see, everything on the task is set-up correctly, but the service is not running & there is no history log being created for running the service - so obvioulsy we are missing a setting.  Any help here???  Does anyone know if Crosstech can interupt a task?  the work station is not in a domain and the window's firewall has been disabled.  The settings to run while the machine is logged-off have also been selected.  Does anyone have any suggestions?  we're just scratching our heads...