Bitweaver RC2 - Install pb

Hello

I try to install Bitweaver RC2 on a shared host and I have some trouble.
When I try to go on the installation page, I have nothing event no error message (:frown:) and Firefox propose me to save the page "install.php" or open it (:surprised:)
Same with "index.php".

I have try to do it with IE6, but here it tell me that it can't found the page ...
I already installed Bitweaver 1 on this host without problem.
I have an other website using php on this same host and it run without problem.
I have try to create a simple php test page "test.php" and put it in the install folder
( <?php phpinfo(); ?>
and it works without problem

I already check the right (chmod) on all files and folder, I have re uploaded it completely several time and still the same result.

I have some knowledge on php but without any error message or information I can't see what I can do (:confused:)
I even to put a simple (echo "coucou";) at the beginning of the install.php but I still not see anything

Please help me (:cry:)

ericc