How to update samsung galaxy tab p1000 i.e. 2.2 to 2.3. using ADB?

I am updating the OS of my Samsung Galaxy tab p1000 (i.e. 2.2) to 2.3.6 using adb. I am using the steps below: 1. Check whether device is connected or not using ADB. C:\Users\PC>adb devices List of devices attached S6802084d305f device 2. Push 2.3.6 OS (i.e. update.zip) OS to SD card. C:\Users\PC>adb push C:\Android\update.zip /sdcard/update.zip 2765 KB/s (2260360 bytes in 0.798s) 3. Go to recovery mode C:\Users\PC>adb reboot recovery After selecting Apply sdcard: update.zip, I'm getting the screen below. But it shows it for long time. There is no response from device. We waited for 5 hours. No response. How can I flash my Samsung Galaxy tab? Let me know if I am missing a step.