How to "click" the dropdown menu's and radio button on a pop up window

Hi Guys,

 After successfully recording my steps, executing it will generally stop and fail on the scenario wherein a pop up window will open. On this pop up window, i will then need ​to select a value on the drop down menu (lets say 2). Based on the value selected on the drop down menu, radio buttons will be presented and also selected accordingly [kindly refer to attached popup groupings.png] .

This is the error im encountering:

"Unable to find the target host (Browser/SilverlightApp) to locate an element. Failure: Waiting for frame '[Frame:name=cbox1438672448756,src=http://anl-sit/sit/web/startpage/QZ_Tool_UpdateGroup.aspx,UseQuery:False]' timed out. Error: Wait for condition has timed out
Unable to find the target host (Browser/SilverlightApp) to locate an element. Failure: Waiting for frame '[Frame:name=cbox1438672448756,src=http://anl-sit/sit/web/startpage/QZ_Tool_UpdateGroup.aspx,UseQuery:False]' timed out. Error: Wait for condition has timed out"

Attached is also the error log from the execution.

 Hoping for your assistance.

Thanks!