OneNote Mobile does not work

I getting pretty frustrated...I've installed OneNote Mobile...initially it
worked...however, I needed to flash the ROM on the PDA (an ATT 8525) and
after I did that and reinstalled ON, it would not transfer files. Since then,
I've removed the OneNote program, Checked the Regedit to make sure there was
no references to it...reinstalled and still it won't work. What can I do??
What am I missing?? Is there some fragment of the initial install that is
remaining on my system that is screwing me up?? I don't know where else to
turn for help.

I am using OneNote 2007, Vista on the PC, and WM5 on the PDA and Windows
Mobile to transfer the files. I am also using the John Guin's PowerToy.

Thanks in advance for any help that you can give me.