Admin/Editor logon issues – no access to admin panel

Hi there!
Any help is much appreciated!
There’s been much written on forum about no access to admin panel for Admin-user after logon, but I still can’t find a solution for my case:

I have 3 admins users (AdminA AdminB AdminC )
I’m lookin for wp-usermeta for them and can see something like:

AdminA (B..C)

wp_capabilities a:1:{s:13:"administrator";b:1;}
wp_userlevel 10

But after logon I got ‘You have not enought rights…’ message to access …wp-admin page

I’ve deactivated all the plugins with user’s management (UAM, S2Memebers etc) but none helps

Users been imported with Cimy User Manager from another domain and everything was fine, but I’ve got troubles after installing BBPress. It seemed to broke wp roles & capabilities

I’ve deleted BBpress plugin and bbp plugin roles and then got this issue with admin-access

Any ideas how to fix it? (My site is now on & I don’t want to create a new DB)

It’s strange because when I reset AdminA role to subscriber it logon sucessfully to user profile, and I can see changes in wp-usermeta
But when I switch user role back to Admin I’ve got that error after logon..

Any help is appreciated