Installing Rust:IO failed: Exception has been thrown
My hosts changed IP address over the weekend. Everything is working except for the playrust.io map mod. The error as follows:

Rust:IO> Starting HTTP server on 194.147.120.44:28017 ...
Installing Rust:IO failed: Exception has been thrown by the target of an invocation.
Caused by: An attempt was made to access a socket in a way forbidden by its access permissions.

Calling 'OnTick' on 'RustIO v2.15.0' took 6209ms [GARBAGE COLLECT]
Rust:IO> External IP address obtained from lookup: 194.147.120.42
Calling 'OnTick' on 'RustIO v2.15.0' took average 6215ms

When i go to the playrust.io site and type in the start of my server name, i can see it listed but with a '?' and it can't talk to the server, giving an error connecting to the IP address. So, clearly the mod isn't installing.

Any ideas? Is there a playrust.io mod forum i can ask on?

Thanks,
See http://playrust.io/manual/#!index.md#Troubleshooting
 I keep telling my host this is the problem. They keep telling me they'll create me a new server. But thanks, Wulf. I can see i may have to walk away and change hosts as this is getting silly. They won't admit it's a hosting / TCP problem. They re-assigned a selection of IP addresses over the weekend, and mine immediately stopped working, obviously. When i updated the IP info, RustIO didn't work. I removed everything, and started from scratch and it still can't see RustIO - so i've left it with them to resolve. It's annoying though, as my server is down while they test. That's players potentially losing faith in my server. :(