WordPress MU

hi friends now the main blog's admin blogs use the tinymce editor but the blogs others users don't use it the others blogs it doesnot seen and in intenret explorer said the mistake this
242
2
"tinyMCE" undefined
wp-admin/postnew.php

http://trac.mu.wordpress.org/wiki/DebuggingWpmu

Which version of WPMu are you running?

I know that this was an issue on wp.com a few weeks ago. I know that the editor was updated a couple times since then. I have a feeling that you just need to upgrade to a newer version.

WPMU 2.0 where can i download this version WPMU 2.0?
and i use WPMU 1.0

there is no 2.0, the latest builds are a niche past 1.1 if i'm not mistaken.