iPad doesn't boot

hello guys, i need help.
i have my 1st gen ipad jailbroken on iOS 5.1.1 and i've installed instalous like 2 months agooo, and from the beginning i've spotted strange things like : blank icons showing up on the springboard and soo, but they all faded away everytime i rebooted the device.
Today the installous icon was gone, but cydia was telling me it was still installed, soo i reinstalled (instalous and appsync) twice, but still nothing... so i decided to reboot the device, when it turned on, it showed me that itunes logo with the cable and the arrow pointing at it, it stuck there... i've tryied to restart the device but stilll....
please help, i really need my ipad back... :S

 

I'll give it a try for sure

Hey guys, Thank u for the answers...
I'll give it a try, but i'd like to know if this is a known problem.

PS: i Only download apps that are not available on my country's app store...