I'm having problems with permissions.

I have two groups, A and B.
A is allowed to add content, but not allowed to view anything other than what they have added.
B is allowed to add content and view everything.

In the flexinode permission settings, I have checked the boxes that allow A and B to create content.
In the node permission settings, I have checked the box to allow access to content for B, but not A.

After doing this, A isn't able to add any content and just gets 'You are not authorized to access this page'. If I check the access content box for A, then they can add, but then they can also see everything.

Ideas?

Susie