script binding on Toolbox Problem

Hello to all,
i wrote a pyton script, which runs perfectly by double click *.py either *.pyc under python 2.7 with Arceditor 10.2.1
when i bind the compiled script to a custom Toolbox it will fail by falling in an endless loop, no error.
the uncompiled script also runs perfectly with the Toolbox, only by unchecking "relativ path".
Obviously there is a Problem with my Input data used in the script. i put the data in via configparcer
Do you have any suggestions
Thanks
Chris