ImageMagick batch file stopped working

[serviciicuratenie]

Hi,
Me and another dude are trying to co-write a batch file that shall do various image operations using ImageMagick commands.
We got it to work and I decided to move it to another location on the hard drive. All of a sudden the script doesn't work any more.
It creates the folder "modified" but do not perform the image conversions. I can perform the convert commands from the command prompt but not by using the script.
I switched computer and after a while it happened again!
I have no clue what happened. I have tried to:
Move it back to the original location
Restart the computer, as adviced by Roy in IT crowd
Reinstalled ImageMagick
Prayed to the IT God (who may have many names: Gates, Jobs, Thorvald, null etc)
No success whatsoever! Please help me with any useful tips!
Thanks!!!

[snibgo]

Some more information would help.

Operating system? Script language? Error messages? Version of ImageMagick, reported both when it works and when it doesn't? Exactly what is the script?