retrieve variables posted from Moneybooker

[eluser]nirvanist[/eluser]
hi everyone, as in the topic title , I cant retrieve variable posted from moneybooker,
After the payment process MB send variable with POST method to controller specified by me on my host example : http://site.com/process , but it not work
whene i try somthing like http://site.com/test.php it work perfectly

any idea
thx