Exec () works for me in Apache, but not in IIS, Do I need execute permissions on the command I want to run?

Hi, I have the exec command working perfectly under Apache, But when I try running the same code under IIS it will not work. This command is working under apache: exec('convert -resize 100x100 c:\apache2\apache2\htdocs\uploads\\'.$user.'\\'.$uploadreal3.' c:\apache2\apache2\htdocs\uploads\\'.$user.'\\'.$uploadthumb3); Hi, I guess my questions are, In IIS do I have to give execute permissions to the "convert.exe" in order for it to function. If so how do I go about doing this. Thanks again for everyones help :) I am almost there --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.386 / Virus Database: 218 - Release Date: 9/9/2002