No script generated after recording widget

Expected: I am trying to record a widget which has target=iframe

Actual: No script generated and Design studio displays "No correlation occurances were found. Check that scans were enabled in the recording option"

Steps used to record:

-> Created empty script selecting "Web-HTTP/HTML" in Single Protocol

-> Selected WinlNet level data from Network->Mapping and Filtering (Default option "Socket level data" did not load my widget)

-> Started recording selecting URL and browser

I am new to loadrunner and might be missing necessary setups. Please help me.