Activities tab-missing activities
 

I recently purchased two new computers for my office. I have Office 2007
Basic. In Contacts, when I make a journal entry for a contact, it does not
show up in the Activities tab. I can see a list of all my journal entries for
a particular day ("Go" tab then "Journal"), but they are not "connecting" to
the particular
contact where they were created. Once in a while, if I continously press
the enter key while in the Activities tab, the entries and emails appear for
a second then vanish. I'm stumped. This never happened when I used Outlook
2003. I've tried many things to no avail. Thanks in advance. Dave