My b2evolution Version: 1.10.x

I have several instances of B2 running but have this problem with just this one http://www.medialit.co.uk

If I want to edit a post the page freezes and will not load

http://www.tvcm.co.uk/comblogs/admin.php?ctrl=browse&blog=10&filter=restore

I've tried reinstalling B2 but the problem still persists

If I'm logged on and look at the blog postings I can use the "edit" link below the posting to get into edit but I can't edit from the back office