Wirelessly posted (htc Pocket PC: Mozilla/4.0 (compatible; MSIE 6.0; Windows CE; IEMobile 8.12; MSIEMobile6.0) Sprint T7380)
Have you tried the OneNote app?
Just guessing here.
Maybe delete partnership, uninstall and reinstall WMDC on your pc and then re-create the partnership and make sure you select to sync notes.