Error messages when clicking on galleries

[Eskie]

I've setup a few galleries but none will display properly and I'm receiving various error messages, yet some of them did display correctly the first time I set them up!
The Galleries are at http://awe-dj.co.uk/Testimonials/testimonials and are on the sub-menu of the tab, titled:

Events B&G Photos Dartmouth House Client Testimonials Dancefloors Backdrops Mood Lighting

If I click on Events I receive the error message:
"Message
You don't have access to this page"

If I click on B&G photos, the error message is
"Message
You are not authorized to do this action"

and it displays a login page

if I click on Dartmouth House, the error message is
"Message
Invalid Category id"

and so on. Every one of the links to a gallery displays one of the above error messages.
I can't see any reason for it. I guess the solution is something simple but I can not find it

[iami]

At least part of your issue might be related to this thread:
viewtopic.php?f=1&t=15893

[Eskie]

No, I changed the access from 1 to 0 in the sql database and it made no difference.
From that thread it seems that a lot of people are having this issue so surely there should be something in the help documentation about this and a CLEAR solution, even after reading through that whole thread there was not a clear answer on how to resolve the issue.