Flash plugin detection in Internet Explorer v7??

I am working on MP3 player app that uses navigator.plugins array in javascript to detect

the client Shockwave Flash plugin version. This works in DOM based browsers such as

Firefox and Safari, and also in Internet Explorer 5.0 on Mac OSX. I have been looking

at the detection code that Flash generates when the file is published, but I can't see what

would be different for detecting plugin verion in Internet Explorer v7.

I have a client/friend who has a new laptop and I wanted to show her the app but it would

not load correctly due to plugin detection failure. I asked my sister who also has and uses

Windows to test it and for her it would also not work in Internet Explorer v7; plugin version

detection fails.

Q: What is different for detecting plugin verion in Internet Explorer v7 (Windows, or any

other platform it might be run on)?

Thank you for time and attention.

JK

code I use to detect plugin versions:

clientObj.getSwfPluginVers = function()
         {
          var UA = clientObj.nav_ua;
          var outStr = '';
          if(clientObj.namePat.test(UA)) // for Opera v8x (?)
            {
             for(var i = 0; i < navigator.plugins.length; i++)
                {
                 if(navigator.plugins.name == clientObj.hold)
                   {
                    continue;
                   }
                 else
                   {
                    if(navigator.plugins.name == "Shockwave Flash")
                      {
                       clientObj.swfVers = navigator.plugins.description;
                      }
                   }
                 clientObj.hold = navigator.plugins.name;
                }
            }
          else
            {
             for(var i = 0; i < navigator.plugins.length; i++)
                {
                 if(navigator.plugins.name == "Shockwave Flash")
                   {
                    clientObj.swfVers = navigator.plugins.description;
                   }
                }
            }
         }

Then more code to reduce to single digit version.