I updated my server from lenny to squeeze and Ispconfig.

I got everything back in place except a right problems.

if i us "mkdir" with php i get : permission denied.

whoami return : "www-data"

File owner are like before (for example web54:client4), same for directory

Ftp user work fine, create new file and edit file with the same right (web54:client4)

I don't understand why it does'nt work in php and I don't have any idea where to look now ?

Thanks for your help,

Francois