Create a new Jco Connection thought the Webdynpro Content administrator

When I try to create a new Jco Connection thought the Webdynpro Content administrator, I have to define a model data and a metadata destination,

when i created the model data destination I choose the Data Type: Application data, and it says that I should define if I want a Load-balanced Connection or a

Single Server Connection. If I choose load balancing, the next step is to define Message Server, and the logon group. Here is the issue. the message server I choose had some logon groups defined because the server was generated based on another server, so those groups are useless, I went to the message server and establishes a new logon group through SMLG transaction and delete the old ones, but still the logon group shown are the old logon groups.

Is there anything else I need to do??

Thanks in advance

Henry Lopez