AJAX Toolkit - Doesn't work with newest version

We had a problem a couple of weeks ago where our Ajax toolkit stopped working on both our development and production servers. We decided to install the new version and updated all our references to <ajaxToolkit:xxxxxx> and <ajaxToolkit:ToolkitScriptManage>, etc.   Some of our Ajax tools work, but many do not.

Masked Edit Extender - works with Date masks, but if we use Number masks with a prompt ( _ ) the form includes the leading prompt in the data to be passed to the database (SQL). Example: "_ _ ,123,456.00" will be sent to sql db.

Accordian - Fails completely and returns an error: "Object doesn't support this property or method"

We are using Visual Web Dev Express 2010 on IIS7 servers.

Thanks for any ideas!