Since my Mac had troubles, I completely reinstalled my Mac and installed Office for Mac 2011 again from CD rom. After that I had to install some pretty old updates until I came to my current version 14.4.3. 

Now when I want to lookup a contact person, the search function does not work anymore, which is time-consuming and annoying. 

Is there anybody out there who can help me fixing this problem? 

Kind regards in advance, 

Wendy