Centro datebook won't sync, no errors

Question

I have had my Palm Centro 3 months and have not had problems syncing since I got it, but it has stopped syncing my calender/datebook and contacts/addresses.  I am running Windows XP home and Palm access 6.2.2 (hotsync version 7.0.2).  I previously used a Palm Zire 72 and upgraded to the centro in Sept.
When I sync, I do not get an error message and it does not hang up/delay anywhere, it just completely skips the datebook and addresses, seems to jump in at "6 of 12".
In the hot sync manager, everything is checked, including the date book and address book.  I have tried syncing as "synchronize the files", "handheld overwrites desktop" and "desktop overwrites handheld", but it does not change.
I have DbFixIt and I have no corrupted files on the palm centro.  I have gone into palm desktop>tools>options>Tools> to check for any corrupted files on the desktop, with no corrupted files found. 
I have deleted the desktop from my computer and reinstalled from the disc that came with my phone.
I sync to palm desktop (not outlook) and have made sure the palm conduit sync is syncing with palm and not outlook.  I have performed a soft reset.  I am syncing on the correct User name.
I have scoured these boards for any other ideas.
I am ready to throw in the towel, but I love my centro and have used palm for 5 years now and hate to give it up.
I have done everything but a hard reset, but before I did that I wanted to see if anyone else had any other ideas.
And, my husband's centro sync fine, no problems, while syncing the datebook and address book fine, on the same computer, on the same palm desktop program.  So, I am thinking that the problem in on my palm as opposed the palm desktop program itself.
See below for a copy of my sync log:
HotSync session completed with errors on 12/06/08 00:30:54
 HotSync session started on 12/06/08 00:30:09, and completed in 45.0 seconds
 To Do List synchronized successfully
 Duration: 0.8 seconds
 Memo Pad synchronized successfully
 Duration: 1.3 seconds
 Media synchronized successfully
 Duration: 13.5 seconds
 Backed up some files successfully to Lisa's Backup folder
 Duration: 15.6 seconds
 Backed up 3 file(s) successfully
 MultiMail BData
 HxSyncRegistry
 Saved Preferences
 Failed to backup 1 file(s)
 PmTraceDatabase
 Protocol Error: Handheld file could not be opened. (4004)
 SYNCERR_FILE_NOT_OPEN
Any suggestions are welcome ......
Post relates to: Centro (Verizon)
Post relates to: Centro (Verizon)

Answer 1

Ok, I saw that I have the "Pm trace database" error, so I fixed it.  Now sync is giving no errors at all.  But still skips datebook and addressbook.
Log:
  HotSync session completed successfully on 12/06/08 01:09:03
 HotSync session started on 12/06/08 01:08:37, and completed in 26.0 seconds
 To Do List synchronized successfully
 Duration: 0.7 seconds
 Memo Pad synchronized successfully
 Duration: 1.3 seconds
 Media synchronized successfully
 Duration: 3.2 seconds
 Backed up all files successfully to Lisa's Backup folder
 Duration: 8.9 seconds
 Backed up 3 file(s) successfully
Post relates to: Centro (Verizon)
Post relates to: Centro (Verizon)