Publish – No drop down – HELPPP!!

Hi there,

I add a new post etc and then when i want to either backdate or change the visibility or publish settings no drop down comes up? it just changes the URL to this:

http://csm.samrowedesign.co.uk/wp-admin/post.php?action=edit&post=506#edit_timestamp

but nothing happens any idea on a fix as this is really irritating.

Cheers

Sam