I have been hosting a server for a while now (private) and recently it hasn't been working. When i run MCsharp, nothing happens (also tried upgrading to MClawl)... this is really strange.

One of my friends managed to join the server but every time i load it up the browser/World of Minecraft just crashes completely. It's so bizarre and i have no idea how to fix it.

Any suggestions are welcome, thanks.

Port is forwarded and i have the latest java. I can also join other peoples servers no problem.