Nokia :: Phone Contacts Not Displaying In 5800

The contacts stored on my phone's memory are not being displayed. If I change the "Contacts to display" option to phone memory and sim memory, or sim memory alone for that matter, it displays all the contacts stored on my sim, however no contacts are displayed when I choose phone memory alone. I have tried copying all my contacts from sim back to the phone and still nothing. It's weird because when I do a memory details check on my phone's memory, it's saying that there are 83 contacts stored. Even if I try to manually add a new contact to the phone memory, it STILL is not showing up in my contacts list. I have had this phone about 5 months now and this problem only occurred about a week ago, before that everything was working just fine.