Layer Palette Problem in PSP7

Hello, first timer here, long time lurker..

For the past few times I have opened up my PSP7, I have been having a problem with my layer palette. It only shows the opacity section & the blend mode section..not any of the layers..So I'm not able to see what layer I'm working on or drag anything...

Here is a picture of the problem:



Anyone have any clue why this is happening? TIA!!

EDIT: I ended up re-installing the program and WALLAH, it's back to normal...of course I saved the workspace immediately to a default just incase it decides to play with me again! Thanks to all those who tried to help! You guys are quick!! Great community & keep up the good work!!!