IP4 4.1 JB calendar issue

[whatsup?]

My iphone 4 4.1 JB stopped letting me use the calendar. I can open it but when I try to add an event it shuts down. I tried fixing it via iTunes, installing extra calendar applications but nothing. Pls help. thanks.

[iYeow]

Looks like your IOS 4.1 is corrupted, a restore is what you need.