IExplorer/Yahoo Messenger Games Plug-In Error "Object doesn't support property or method 'onSoundOn' "

IExplorer/Yahoo Messenger Games Plug-In Error "Object doesn't support property or method 'onSoundOn' "

Hi, i am using Windows 8 32-bit, Yahoo Messenger 11.5.0.228, Java Ver 7 Built 17 (built 1.7.0_17-b2) and my Security Settings are set to Low, for enabling Java Script to run properly. However, when i try to play any game in the Yahoo Messenger Window, an error appears saying:

1. Object doesn't support property or method 'gameSendData'
or
2. Object doesn't support property or method 'onSoundOn'

I think this error is from Java Plugin and not directly from Yahoo Messenger or IExplorer.

When i try also to playYahoo Games IN Internet Explorer, all works fine, Java Plugin is loading just fine, but when i try to play Games from within Yahoo Messenger, an error appers....