Sorry after moving moving all my plugins in separate folder it works fine.
Moving them back 1 by 1 i can isolate the one giving problems:
cleanup-images
Sorry again, problem is solved
I tested on a demo blog, with a new install of BackWpup, and it’s the same.
I’m hosted by 1and1
After exploring i saw in the post
BacWPup 2.0 and WP 3.2 totally broken
that abaiuley with the same problems has partched a 1.7.8 version
I will try it