This response comes courtesy of virtualization expert Rick Vanover:
For Linux installations, the root login is permitted to log into VMware Server’s Web Access by default. VMware Web Access, however, may not be running correctly based on the information provided. In such a case, Web Access can be restarted by the vmware-webAccess restart command. If the issue should persist, a re-install to a current version of VMware Server would be a good idea. I would also recommend checking the VMware Communities site, and search based on log messages from the Web Access processes.