Interface Not Registered Message When You Try to Send or Save an E-mail to the Drafts Folder in Outlook 2002 - Microsoft Office Help Tips
The Microsoft Outlook email client allows you to save emails that you have not finished composing in the Drafts folder allowing you to go back and finish them later before sending. Most of the time Outlook uses Microsoft Word as its email editor since its tied together with Outlook through Microsoft Office. Just because the 2 programs are part of the same Office suite doesn't mean you will never run into problems.
You may experience a situation where you are using Microsoft Word as your e-mail editor in Outlook 2002 and receive the Interface not registered message. You may also experience a situation where your e-mail is not sent or it is not saved in the draft folder. This behavior occurs if the Ole32.dll file that is located in the Windows\System32 folder is not registered correctly in the registry.
To fix this issue you will need to register the Ole32.dll file. To do so, follow these steps:
1. Click on Start, then click Run, type Regsvr32.exe %Windir%\System32\Ole32.dll in the Open box, and then click Ok.
2. In the RegSvr32 dialog box that appears, click Ok.