Problem recording Drupal web apps

Hi,

I'm a newer user of Vugen and have a situation where during recording, Drupal applications are rendered differently than what is captured for the replay report.  While recording and during replay if "Show run-time viewer during replay" is checked, the web application displays the navigation vertically (almost as if it is rendering the web application on a  mobile device).  The replay report shows the navigation, as it normally appears, with a horizontal navigation bar.

I am using LoadRunner 11.52 (Vuser Generator 11.52.0.0) with Windows 7 Professional (version 6.1.7601 service pack 1 Build 7601) on a 486-based PC.

Any guidance that can be provided is appreciated.

Thanks.