iPhone 3GS All folders disappeared after reboot.

Hi,

I am using ihone 3GS jailbroken and unlocked in India. During unlocking the version was downgraded from 5.1 version to 4.1

As it was password protected, my little kid was pressing some buttons and it got rebooted.

But after it came up I just see my default wallpaper with no apps or folders. It shows network operator and battery information on top and I am able to receive incoming calls and talk. The ringtone is the cusotm ringtone which I had set.

But I cannot dial outgoing call as no keypad is available. It almost is blank and moreover iTunes is not detecting when I connect it to my Windows PC.

I would really appreciate any help on this.

Thanks & regards,

Sudhir