Does not work with TinyMCE

Hello! I've tried installing this module on Drupal 5.6 with the latest TinyMCE module for drupal 5 (5.x-1.9) and latest tinyMCE engine (3.0.8) but it doesn't work properly. I've followed all instructions correctly even updating jQuery plugin for drupal and adding jquery.form.js.. I'm getting this error message on FireBug - tinyMCE.updateContent is not a function
http://localhost/drupal5/sites/all/modules/autosave/jquery.field.js
Line 242. Did I miss doing anything? How could we resolve this issue? Thanks for your help!

-mike