Probleme Executing a stored procedure ....

I'm using Apache 2.2.17 / PHP 5.3.6 / SQL 2.0 PDO Driver

Hello, I'm trying to execute a specific stored procedure but this doesn't work...

This procedure work when running from SQL Manager  ( I take the exact syntax I'm using in PHP and its work)

I used SQL Profiler and saw that the procedure begin and immediatly end without doing anything ....

Any idea of a such strange thing ?????