Trying to restore USB OTG functionality

[bobnjan4]

So, I've unrooted and gone back to stock rom v 3.2 after trying a custom rom. Seems my battery life was in the tank with the custom rom. However, the stock rom I've flashed back to with Odin appears to not have the necessary driver(s) for my USB OTG to work. I got the USB/SD Card adapter when the tablet was new and loved the way I could connect storage or input devices.
Can someone steer me in the right direction to restore USB Host/OTG? Do I need the original 3.0 or 3.1 rom? If so, where can I get it?

Thanks guys!