I am sure I must have screwed up something to cause this behavior but as a relative newbie I am still leraning:

I can Add core modules to my home page (like Text/Forums etc) but when I try add them to other pages, it seems to go thru the motions of adding the module (and it shows the "Install Aplication Features" link after the Add, but it never actually adds the module to the specified area (content in my case).  Basically, it is redirecting me to my home page when complete but never adds the module when I go back to that page.  No errors are visible.  Of Course I am signed in with Admin privledges when doing this.  I know that it did previously work before, but I suspect somehow I must changed a setting that is preventing this and it is making my hair turn greyer than it already is.

Any suggestions would be appreciated.