If you have ticket support, I would suggest putting in a ticket. I'm sure it's a permission issue, but it's impossible to pin-point it from what has been said so far.
If you have a vB4 Suite License, then you would have ticket access. If you have a vB5 Connect license, then you would have ticket support for one month after purchase. You can also purchase ticket support. You may want to post about this on vb.com and see if they have any other ideas.