Java SE (Java Platform, Standard Edition)

I'm trying to get javax.comm API to work with Web Start and I followed the following work-around suggested.

      String driverName = "com.sun.comm.Win32Driver";
      CommDriver commDriver = (CommDriver Class.forName( driverName ).newInstance();
      commDriver.initialize();

      System.setSecurityManager( null );

I ge the following exception when I try to run the application I downloaded through Web Start.

javax.comm.NoSuchPortException
at javax.comm.CommPortIdentifier.getPortIdentifier(CommPortIdentifier.java:105)

I know the port exists because the same code works when I run it directly in my IDE.

Any ideas of what I could be doing wrong here?

Thanks,
Krishna