How can I get the App store to work?

Question

I cannot get my App store to work on OS 10.7.4  I don't know how I am going to upgrade with the new system.  I thought the new up grade would help fix the problem, but now I don't know who to get the upgrade because my app store won't load.  I am getting the screen that says
One Moment Please.
Connenction to the iTunes Store.
                Loading...
If I tunes doesn't open, click the iTunew application icon in you Dock or Windows Task Bar. To download iTunes, Please click here.
I have tried sign off and back on.  My iTunes works just fine. Only the App store doesn't work.  I have tried the terminal message thing.  I have tried to find my file.  I bought Lion from the app store.  PLEASE help I am so frustrated.  I want to cry.  When I as for help they send me to the boards to the support thing, but nothing on those pages have helped me.  I know there are other post, but  I don't know how to just dump eveything reload and then back up from my time capsule.  How do I do that?  I will that we could just reboot the App store. 
Thanks

Answer 1

Incase one is wondering... I found the answers in this entry
https://discussions.apple.com/message/18810192#18810192
I tired the
rm ~/Library/Preferences/com.apple.appstore.plist
rm ~/Library/Preferences/com.apple.storeagent.plist
rm -rf ~/Library/Preferences/ByHost/*
at first because the person was working out of lion but it kept saying not found, but I did everything else here next.  I added the debug thing and didn't work but I didn't.  Then I deauthorized my computer iTunes and reauthorized then signed in and out. Did not work. I then ran the permission  part of Utilities and then ran the repair.  after this I copied all three lines together pasted them into Terminal.  After that it worked.    I am so happy right now.  I think I had to repair the disc to get it right.  I wrote everything I did incase it was a combination of every thing. 
This is how to enable the debug menu that is part of the thread. 
Quit the Mac App Store
Launch the Terminal (located at /Applications/Utilities/)
Type the following command into the Terminal and then hit return:
defaults write com.apple.appstore ShowDebugMenu -bool true
Relaunch the Mac App Store, the Debug menu is next to “Help” in the menubar
So now to the interesting part: what me helped was to select "clear cookies" in the debug menu first, and second to select "reset Application"
This was all found in that thread, but it is 11 pages.... this might be more helpful.  There are other suggestions in the tread if this doesn't work for you.