Not sufficient permissions

Hello all,

I know that it’s a regular problem…
But I didn’t resolved it.

I explain you:
– I copy/pasted a version of my first WordPress Site (site) for an english version.
– I exported/imported my db sql in my new site. (site_en).

My site (site_en) works but I can’t login in /site_en/wp-login.php
I use my login/password but I have this message:

You do not have sufficient permissions to access this page.

I verified that it’s not Read-only

Thanks a lot for a tip
Arno