Might very well be if your dll tries to install itself into HKLM or HKCR.
You need to implement your own version of DllRegisterServer that uses
RegOverridePredefKey to redirect the registry output ot HKCU before the
default implementation of DllRegisterServer is called.

Dmitry Streblechenko (MVP)
http://www.dimastr.com/
OutlookSpy - Outlook, CDO
and MAPI Developer Tool

"Slava Barouline" slavadotbarouline@recruitmentsystemsdotcomdotau wrote in
message ...
Unfortunately my development PC is Windows XP not Windows Vista

I still beleive it's permissions restrictions in Windows Vista due to UAC