Dashboards are not displayed in portal when viewed in IE

Hi Experts,

Our environment details:

SAP Netweaver Portal 7.4

Integrated with SAP BO BI Platform 4.1 SP3

We have some dashboards published in SAP BO BI Launchpad. The users view the dashboards from hyperlinks in SAP NW Portal.

Since we upgraded our BO version from 4.0 to 4.1, the users are unable to view dashboards from portal - it just displays a white blank screen. This is happening only for IE (checked in version -9,10,11). With Firefox 29 and Chrome 34, the dashboards displays properly.

Any idea ?

Regards,

Arijit