Script won't work on shut down

Hello,
I created a sync job.
Then I created a batchfile. The batchfile works fine.
But if the batchfile starts on windowsXP log off script nothing happens.
This is the batch file:

Rem batchfile
echo Start %date% %time% >>C:\Temp\logTouCan.txt
C:\Programme\Toucan\Toucan jobname
echo End %date% %time% >>C:\Temp\logTouCan.txt
Rem end batchfile

This is what I see in my logfile logTouCan.txt:
Start 11.01.2010 11:52:25,02
End 11.01.2010 11:52:25,27

I wonder why Toucan runs only for one second.
Does anybody else has the same problem with Toucan and log off script?