Roll Up Hide and Seek

I have made only two roll-ups before and keep having a problem with the left side disapearing when i press the button. In the Visability columb i have for the roll down button, "Show Windows If Rolled Up" and "Show If Window Is Active". For the roll up i have "Show If Windows Is NOT Rolled Up" and "Show If Windows Is Active" Transparency being used is enabled. Alpha blending is also enabled .