eval() Error on Exec-PHP with INCLUDE and GET parameters

Hello, WordPress is just great. But now I’m having a problem with the Exec-PHP plugin. Actually I think it’s a wordpress problem (or unknown behaviour to me), not a plugin problem.
Usually Exce-PHP plugin just works fine, for example I can use a simple “include” as this:

include ‘myprog.php’;

but it’s not working when passing parameters to this included php file:

include ‘myprog.php?page=feature&id=2’;

this is strange. Here I get:
Warning: include(myprog.php?page=feature&id=2) [function.include]: failed to open stream: No error in C:\xampp\htdocs\T2P-Wordpress\wp-content\plugins\exec-php\includes\runtime.php(42) : eval()’d code on line 16
Warning: include() [function.include]: Failed opening ‘myprog.php?page=feature&id=2′ for inclusion (include_path=’.;C:\xampp\php\PEAR’) in C:\xampp\htdocs\T2P-Wordpress\wp-content\plugins\exec-php\includes\runtime.php(42) : eval()’d code on line 16

Does someone have an idea why?
Thanks
hb