WDTV Live connecting problem to SlingBox 350 after new firmware upgrade

I have three WD TV Live, and have been using it as connect device to SlingBox 350 and 500 at remote location.

After upgrading new firmware (2.02.32), three WDTV Live couldn’t connect to SlingBox. Othre device like, SONY GTV, iPhone, iPad at my place work well as before, but WDTV is not working after upgrade.

Is there any way to get previous version of firmware and downgrade my WDTVs?

Here’s my guide … follow steps 1-11 precisely …