Galaxy Tab 2 7.0 P3100 usb debugging problem

I am having a problem enabling usb debugging on my p3100. My problem is that I want to flash a new recovery and rom via odin because my P3100 having a random restart every 30 secs or 1min. Even I enable the usb debugging it gets uncheck when it restart thus flashing via odin is always unsuccessful. Need help why I am having this issue.

Thank you so much and regards.