I tried solving his problem at RSbots.net.
Every known fix of mine didn't work.
Here's a screeny of the exact error:
I've got a few of the developers on it.
Edit:
Also, I was reading some people saying to install nexus21.320 build. Here is my upload of the nexus21.320:
http://www.mediafire.com/?myzzojm3ntg
Download it yourself, copy the file into the "jars" folder of the bot client, run the install, run the bot, it will ask to update, run the install once again, and run the bot for a final time.
OR
You can go back to RSbots.net and PM me your teamviewer again and I can do it for you.