When the game crashed I think an extra step needs to be done to enable the web client to work. I pulled the below from the FMud website.

(Please don't make me work at work)


Installation

FMud is packaged as an swf file suitable for embedding within a webpage. A sample html file is included in the download package. This html file contains the minimum code necessary to embed FMud in a webpage, although more complex configurations are possible.

The latest version of Flash Player also requires a policy file on the server to allow socket connections. A sample policy xml file and script to serve this are provided in the download. See this post for more information. New in version 0.7 is the ability to specify the port you wish to serve a socket policy file. This means game administrators without root access can now successfully use FMud by binding the policy file server script to a port above 1024.

n/t