How to reset device passcode on iPad, as erase procedure doesn't seem to work?
To put your iPad in restore mode:


Connect your iPad to your computer (iPad and Computer turned on, iTunes opened on computer)
Press and hold Sleep/Wake + Home button until the screen goes black
Release the Sleep/Wake-Button but KEEP PRESSING THE HOME BUTTON until the iTunes logo appears on the iPad. Now in iTunes you should be able to press "Restore".


(The iPad Software will download, if the iPad exits restore mode while the download happens repeat the steps when the software finished downloading...)

NOTE: All the data on the iPad will be lost.