Ok here goes:
IMPORTANT!!!!
Backup your registry before doing the following. Just in case. From within Regedit click File>Export and save it somewhere safe.
To use a registry entry, add a DWORD value named AllowActiveXOneOffForms to the HKCU\Software\Microsoft\Office\11.0\Outlook\Security value and set it to one of these values:\
0 Load only the frm20.dll controls, the Outlook View Control, Outlook Recipient Control, and the docsite (message body) control
1 Allow only controls marked as "safe for initialization" to load
2 Allow all ActiveX controls to load
To do the above do the following:
Start>
Run>
Type: regedit
OK>
Now your in the registry editor. Now you need to navigate to the folowing location:
HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\Security value
Now here you need to DWORD value called AllowActiveXOneOffForms do the following:
Edit>
New>
DWORD value
Name it AllowActiveXOneOffForms
Now right click the value and select Modify
This is where you put the value of one of the above in either 0,1 or 2 depending on what you want it to do.
I hope that helps but be warned messing with the registry is not to everyones taste but I have done it many times before for various reasons and haven't had an issue with it.
Cheers,
Rich