The page is not writable on some pages

Hi,
I have moved website to the new server and unfortunately I am getting "The page is not writable
" error message on some pages (Home). I have tried to change chmod to 644 as well as 755 to all files/folders to under site/ directory but with no result. Any idea how to fix that?

The /content folder and all contained files and folders must be writable.
The /site/accounts folder must be writable.
The /site/cache folder must be writable.
The /thumbs folder must be writable.
The /assets/avatars folder must be writable.

That means that ownership AND permissions have to be set accordingly!