Hello.
Please go to theme’s functions.php and clear all the empty space right after <?php mark and before the first text at the top of the file, and clear the empty space at the bottom of the file between the last text and the mark ?>.
If you do not understand what i mean, please zip the functions.php file and post it as a private message and I will do it for you. Or you can send me your ftp details so I can fix it.
Robert
