exec

Hi I am trying to use exec command (php4 + Win98 + apache). exec('c:\mydir\unzip myfile.zip -d c:\mydir\mydata\'); I executes without errors but nothing is unzipped. When I run the same command from the dos prompt it unzips OK. c:\mydir and mydata are outside the httpdocs directory! I have over 300 .zip files which all contain a .mdb file with same table structure and same name. I wrote script that will read all of them (one by one) but wish to automate the unzipping process. Any ideas. Ajdin