Problem with offline files: Synchronization error "no access"

I use VISTA business on my VAIO TX5MN. When I change offline files on my
VAIO in offline mode and later try to synchronize them with my PC with XP
SP2, I get errors "no access". I found out, that files like {6354725448}.tmp
appear on my PC with XP. New files on my VISTA VAIO or new files on my XP PC
or files changed on my XP PC are synchronized without errors. This seems to
be a serious error in VISTA.

I found some interesing articeles:
http://support.microsoft.com/kb/296264/en-us

https://blogs.technet.com/filecab/ar...11/441131.aspx

In fact, I had wrong settings, concerning "opportunistic locking". I set
proposed values in my XP registry:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Servic es\MRXSmb\Parameters\
OplocksDisabled REG_DWORD 0
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\LanmanServer\Parameters
EnableOplocks REG_DWORD 1

But now I still get my "no access" errors. Wo can help me?