Outlook and Onenone (using Microsoft Office Ultimate 2007)

Hello, I was not sure which category to place this under.

I have been using Outlook 2007 (12.0.6300.5000) SP1 MSO (12.0.6213.1000)
with the addin OneNote (onbttnol.dll) 2007 (12.0.6211.1000) SP1 MSO
(12.0.6213.1000) (displaying on the Quick Access Toolbar of Outlook)
absolutely fine until yesterday when, Microsoft displayed a message (when I
was trying to send an email to OneNote)_that Outlook had stopped
working, trying to find a solution, then was restartng itself continuing with
the dialog box ?Outlook experienced a serious problem with the 'onenote notes
about outlook items' add-in. If you have seen this message multiple times,
you should disable this add-in and check to see if an update is available.
Do you want to disale this add-in? At first I said no and the following
happened (same error as previously stated one). So I finally disabled the
add-in OneNote, because it finally would stop Outlook and not allow me to
open it until it was diabled. Now I can start OneNote independently from
Outlook as a stand alone application, but I need the two to work together so
I send email over fast and efficiently. There was one other error, that I am
trying t recreate for you but cannot, where a dialog box comes up and
indicates that there is a problem with some type of H_Key something. (I know
that is vague) but I just can't get it to reappear. I am desperate for
help in this. I even went out and downloaded any 'important' updates from
Microsoft for Outlook and OneNote(where there weren't) to see if that helped.
I then rebooted tried and I continously get these same error conditions.