This may be a problem with your actual software. A factory reset should resolve this problem for you. The steps to perform this are listed below:
1. In the device options, click Security Options.
2. Click General Settings.
3. Press the Menu key.
4. Click Wipe Handheld.
5. To delete all third-party applications from your device, select the Include third-party applications check box.
6. Click Continue.
7. Type blackberry.
Hope this helps.