This could be an issue described in the Installation Guide. Have you read the "Running Configuration Tool on a separate machine" section? Here is an extract:
Note: If Aware IM Server is running on the Linux or Mac OS X machine make sure that the file etc/hosts has the following entries:
127.0.0.1 localhost
x.x.x.x serverName
where x.x.x.x is the IP address of the server where Aware IM is running and serverName is the network name of the server.
Additionally if you are running the remote Configuration Tool from a Linux or Mac OS X workstation make sure that the etc/hosts file of each workstation has the same entries as
the etc/hosts file on the server.
Have you checked for this issue?