Deleting Moodle courses

[santec]

We have been evaluating Moodle on our own hosted server (Win 2003) and are now ready to go live.
I'm in the process of tidying things by deleting all the unwanted courses that staff have created - but I can't delete any of the courses. I get the long list of deleting items menu then it just hangs with no confirmation button.
I can move the courses but can't delete them - I've created a new course and then tried to delete it but no go - anyone had this problem or got any ideas on sorting.

[danIT]

Which version of Moodle are you using?

[santec]

We are using 1.92+ having upgraded from 1.8

[danIT]

Can i suggest turning Ajax on, if its turned off and the attempting to delete the course?

[santec]

Tried enabling Ajax still can't delete. The delete process works up to a certain point i.e. all of the activities and blocks get deleted but stops after "last user access" leaving the following remaining to be deleted:

backup_log
Grades, Items, Categories
Outcomes
Scales
Settings
Letters