I cannot install the Flash Player 11 from the Flash official site as the .deb file cannot be handled by the BackTrack 5 R1 for the download.

Meanwhile, after managed to get the .deb file and installed. The Firefox 5.0.1 on the BackTrack 5 R1 reports no Flash plugin. Therefore, Nessus cannot be ran properly.

Any idea to fix these problems?

Samiux