JMF 2.1.1e works with a 64 bit JDK/JRE. I tested it on Windows 7 x64. Assuming the webcam drivers are installed properly and you could also test it with an alternative application such as Skype just to make sure it works, then you are set to verify your JMF installation.
Start JMStudio and go to the 'File->Preferences' menu. That brings up the JMF registry editor. Go to the 'Capture Devices' tab and click on 'Detect Capture Devices'. That should bring up your webcam in the list. It would be listed as 'WDM Image Capture' or something similar. Please note that if you want to commit something then you should have launched JMStudio with administrative privileges.
You can capture videos or take snapshots using your webcam by selecting the 'File->Capture' menu (Ctrl-P).
Your application should be able to use JMF and work with your webcam if the above works unless you forget to include the correct libraries or miss something in your code.