Cant see drop down menu in Report server manager even after starting the explorer with admin previlege - Windows Server 2012

Hi, 

I am not able to see drop down menu in report manger, have loaded the internet explorer as administrator still it doesn't pop-up drop down menu in Windows Server 2012 platform and SQL Server 2012, can someone please help me out here, whether any settings need to be made? 

Thanks,

Harish