You may have a blank space or line before or after a PHP tag.
Go through your page and remove any spaces between PHP tags and see if it helps.
Cheers
Ian
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.