Not able to change volume and bitrate in IE9 & IE10

I am using Jwplayer version 7.8.7 (Premium version). While playing video , in IE9 & IE10 When I hover over volume indicator to bring up the volume slider at that time if I try to change volume , volume slider disappears. Due to that I am not able to change volume. Same issue exists for bitrate toggling. I am also not able to change bitrate. When bitrate switching option brings up and I try to select bitrate immediately bitrate options disappears. Issue exists only for IE9 & IE10