CAN'T SEE MY FRIEND'S FACEBOOK WALL

You can't see a person's FACEBOOK wall even if he/she is your friend.

SOLUTION :
1.Ask your friend to unhide his wall by following the next step.
2.Go to Account.
3.From the drop down menu, select Privacy Settings.
4.Now select "Customize Settings" in the "Sharing on Facebook" section.
5.In the things I share > Posts by me,select Everyone OR Friends of Friends OR Friends Only from the list.
6.In all the three cases, his friends will be able to see his wall.
7.In the Things other share >Friends can post on my Wall, tick mark the Enable button so that his friends can post to his wall