Q: Photo Stream Not working

See if this helps http://support.apple.com/kb/HT4486

I don't use iCloud, but I wonder if you try to delete the iCloud account from the phone, and then create it again. See if that would help. Otherwise you may have to wait to see if someone that uses Photostream regularly comes in and can provide an answer.

Photo Stream works for newly taken photos.

If you are using Shared Photostream, you have to re-subscribe.

See, I know someone more in the know about this than I am would show up and save the day.

Try these steps:

- go to settings>icloud

- delete the account

- select keep on my iphone

Then do a hard reset:

- hold down the home button and sleep/wake button at the same time

- the iphone will turn off then when the apple logo appears release both buttons

When the phone is back on follow these steps:

- go to settings>icloud

- sign back in with your account

- make sure all features that you previously had on are turned on especially photostream

Wait for icloud to load content back onto the iPhone.

Hope this helps

Hope it's what I suspected.

Then re-send invites.

iCloud: Photo Stream troubleshooting

iCloud: Using and troubleshooting Shared Photo Streams