firmware upgrade encountered an error samsung tab 2

Hi, my samsung tab 2 p3100 is stuck on the "firmware upgrade encountered an error" It was running on slimrom till the tablet hung and then it has come to this. I tried booting it in the download and recovery mode but no luck. No matter what I do, or which buttons i press, it just freezes at this screen. For the last 15 days I've tried all possible resorts, including Kies but no luck, now this forum is the last resort !

Thanks in advance.