Compare request:Calling-Station-Id with control:Calling-Station-Id

Hello, we have a problem that the check if (&request:Calling-Station-Id == &control:Calling-Station-Id) fails, because control:Calling-Station-Id is empty in freeradius 3.0.x. We have a file which contains a list like this one: userXNAS-Identifier =~ "someAP*", Calling-Station-Id += "00-11-22-33-44-55" userX2NAS-Identifier =~ "someAP*", Calling-Station-Id += "00-12-23-34-45-56" and this works well with checkval on freeradius 2.x So what do we need to get this to work with freeradius 3.x ? Kind regards. D. Stabla