Kower

ive problem with executing commandline program mogrify with these functions i tried exec on dir and it works fine i also tried exec on .sh script and it also executes but dont run mogrify from it :( ive put echo behind mogrify and that was dispalyed so i know script was executed of course mogrify binary had permissions set on 777 so can someone tell me where can be problem? i think it can be some security problem but dunno exactly. thx.