I can't control My sims!

[JewlaTan]

After a few days of playing with a family at random i can no longer control all but one of my sims. I also can't open up where their needs are. Is there a way to fix this problem?

[rumbutter]

see if these can help

 http://answers.ea.com/t5/The-Sims-3/ISSUE-Savegame-Corruption/m-p/968290

http://sims3.crinrict.com/en/2011/04/bug-invisible-sims.html