I cannot get any photos into Photo Stream

Question

I have a MacBook Pro late 2011 updated to Mountain lion, an iPad 2 and the latest Apple TV.  I have followed the instructions on all devices to the letter and followed the help instructions in the Apple Support Section, but I cannot get a single photo to appear in Photo Stream. I managed to get an album name to appear in iPhoto Photo Steam shared with my apple ID, but there are no photos. I have dragged and dropped, selected single photos and chose the Share icon, then Photo Stream in iPhoto and chose both My photo stream and the one I managed to name, but it just keeps showing photo count as 0. 
Photo Stream is activated correctly in the Mac iCloud settings and also in the Settings on my iPad, but not one single photo has made it to my Photo Stream fromf iPad or Mac!  I am signed into my ID on Apple TV but Photo Stream has 0 photos.
I have been doing this over and over for a couple of hours.  Everything has been followed correctly, but it just wont add a single photo no matter if I do manul or autmatic.
Any ideas from the community? 
I upgraded to Mountain Lion last night, and everything seemed to go OK.  iPhoto is 9.4.1
Many thanks

Answer 1

Try this basic troubleshooting fix: make a temporary, backup copy (if you don't already have a backup copy) of the library and try the following:
1 - delete the iPhoto preference file, com.apple.iPhoto.plist, that resides in your
     User/Home()/Library/ Preferences folder.
2 - delete iPhoto's cache file, Cache.db, that is located in your
     User/Home()/Library/Caches/com.apple.iPhoto folder. 
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3 - launch iPhoto and try again.
NOTE: If you're moved your library from its default location in your Home/Pictures folder you will have to point iPhoto to its new location when you next open iPhoto by holding down the Option key when launching iPhoto.  You'll also have to reset the iPhoto's various preferences.
NOTE 2:  In Lion and Mountain Lion the Library folder is now invisible. To make it permanently visible enter the following in the Terminal application window: chflags nohidden ~/Library and hit the Enter button - 10.7: Un-hide the User Library folder.
If that doesn't help  launch iPhoto with the Option key held down and create a new, test library.  Import some photos and check to see if the same problem persists. If it doesn't then your current library is the culprit.
Post back with the results and we can go from there.
OT