Problem with permissions after integration

[GreyStar]

I have the following issue when trying to bridge coppermine and XXX:
CPG works fine as stand alone, but when I bridge it with my IPB all permissions set on the groups doesn't work, so no one can upload new photos.
The only way to load them is disabling bridging.
What can I do?

Coppermine install: http://monastero.altervista.org/coppermine/
Forum install: http://monastero.altervista.org/
Coppermine version: cpg1.4.18 (stable)
Forum version: IPB 2.1.7
Test user account: Testcpg / password

BridgeManager settings:
Forum URL:  http://monastero.altervista.org
Relative path to your BBS's config file:  ../
Use post-based groups?:  0

[Joachim Müller]

Enable bridging, then set permissions. That's your only option. The other way around doesn't work.

[GreyStar]

But how coppermine recognize ipb groups?
By ID? By username?

[Joachim Müller]

Enable post-based groups in the bridge manager. The bridge app's groups will then show up in coppermine's groups control panel, where you can set permissions.