stupid dry erase calendar.

I have a "College-Pro" calendar in my room where I can use dry erase markers to write down everything that sits on the wall above my desk but it always falls. Every night I wake up next to it beside me on my pillow or on my desk. Why do you fall calendar? I have an excess amount of sticky tack holding you up but you continuously fall down. Please stop. It frustrates me in the early morn.