Drupal 4.7.0, tinyMCE 2.0.6.1

Trying to use several instances of tinyMCE on one page
with modules like "excerpt". The data from "excerpt" textarea
is not submitted. I heve similar results with "home made" modules
which use several textareas substituted with tinyMCE.

tinyMCE works fine when I only use it in one textarea on page.
If i disable richtext editor in all textareas but one, everything
works fine as well.

Please help. Need several textareas with rich text editor.