Crash Right after I spawn in a server

[Cheemo]

I know I'm a noob and all,but I've had blockland for a couple of months.
Anyway,Whenever I log into a server, an annoying message pops up and it says:
'Blockland has experienced an error.Sorry for the inconvienence(sp?).Send or dont send.'
What is the solution 

[Ad Bot]

[Bushido]

Well, my totally-educated guess says...

Reinstall.

[Packer]

You have totally forgeted it, reinstalled like he said.