Zoo5 with Lab License

Sorry, i am a bit confused about Lab License.
We have a Lab License (30 Licenses) with one CD-key and want to use ZOO Licence Manager from now on to handle this Lizenses.
When we try to add the Licenses to the Zoo Server we are asked to Register, but this is not possible, because it tells that we are already registered with this key. So how can we bring back the already installed Licenses to the Zoo?

thank you

Contact our technical support staff (206) 545-6877. They can help clear this up for you.