Not able to Linux binary

Hello I created a linux binary using GCC. Whenever you execute it reads a file from the current directory and outputs the contents. e.g. - ./myapp output hello world. Now I want to execute it from php() so that I can output the content on a HTML page or get the data in a variable. Reading thru the manuals i came across passtrhu() and exec(). I tried passthru passthru("myapp"); and passthru("./myapp"); but nothing is outputted. What is wronf? myapp resides in the same directory as the application. the page and the app is hosted at my ISP ( Interland ) server. the contents are - /html/index.php /html/myapp Do I need to set up special permission? Karam __________________________________ Do you Yahoo!? Free Pop-Up Blocker - Get it now http://companion.yahoo.com/