IE9 & ArcGIS Silverlight API 1.2

Discussion created by deeptivb on May 10, 2011
I have a Silverlight 4.0 app running fine in IE8, FF 3.x etc. But one of the users who is using it on IE9(the only one who uses it on IE9) has a problem zooming with mouse-wheel. Whether the user scrolls the mouse wheel up or down, it always zooms out. The user is unable to zoom in using the scroll wheel. Is it a compatibility issue of IE9 and the version of ArcGIS API I am using(1.2)?