Hi! I think i found the solution.
First of all i want to apology for my english.
The this thing is something with enrypting data is screwed. I solved this problem by encypted data one more time (in settings->memory (this thing this hard drive icon)). I don't know why this option was not checked. Somethis had to be reseted. After encryption of data i lunched all application, check if all works corecctly and then i turn off phone, checked again, and reboot. Then the same thing whit taking off battery.
After everything was ok, i uncheck encryption option.
Try it. Mayby it will help.