BB Curve :: Three Of The Icons Seem To Not Be Functioning?

Three of the icons seem to not be functioning. Click on anything but Messages, Text Messages and Desktop and they open up. Click on any of those three mentioned above, and nothing. Actually, the device seems to lock up - keyboard locks and so does the trackpad. The only way out is to hit the end/power key, and then you have full function of the device. I've even tried holding down any one of the keys mentioned until the pop up menu comes up, and then attempt "launch," and the same thing occurs. The only way in to a message (for example) is to go to the Notification Bar, click it, then click the specific message. I did this, then tried to come in the "side door" by hitting the Menu Key, then scrolling to View Folder, then to Inbox (for example) and as fast as you can click, it dumps you back out.