.Net Compact Framework OnKeyUp Event Does Not Fire for WebBrowser Control

The KeyUp Events are not fired for WebBrowser on the MobileDevice.

We are using Windows Mobile 6.5 with .Net Compact Framework 3.5.

I have tried using the fix which I found in this discussion (http://social.msdn.microsoft.com/Forums/en-US/0b94e3db-eda0-4655-b349-59774f0f8465/webbrowser-control-on-windows-mobile-65-with-net-compact-framework-35?forum=netfxcompact) but still it is not working.

Thank you