hmm did you change that registry key in the right part (depending on your OS architecture 32/64 bit it’s a bit different) as described in the post I linked earlier - Enabling HTML5 in the Windows .net Player
HKLM\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION
HKLM\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION
Also make sure that there isn’t a decimal/hexadecimal mistake.
Perhaps show us a screenshot of your register regarding XiboClient.exe