why can't I install adobe reader 11.0 on my mac?

I have a Mac 0s X, 10.6.8

For months I have had trouble installing Adobe Flash 11.7. I've been on the Forum about the problem for a week and have had suggestions, none of which have worked.

Today I tried to install Adobe Reader 11.0 and cannot install it either. Here is the screen shot:

tottieirene