The best resources for problems with a GIS-PAX RLM problem are available from Reprise Software. In particular:

Port 5053 in use, waiting...

This is almost always due to another RLM process using the same default port. This article discusses the ports RLM uses: Configuring RLM ports

A great tool to debug which ports are in-use on the license server is:

  • TCPView.exe - A windows program that will show a detailed list of all TCP ports on your license server. It is available from