name can't be null while loading driver com.sun.comm.Win32Driver

"Caught java.lang.NullPointerException: name can't be null while loading driver com.sun.comm.Win32Driver"

I'm trying to acccess the serial port using the Java Communications API and I get this error. I followed these instructions to install:

1. Download and unpack the javacomm20-win32.zip file.

2. Place the win32com.dll in <jdk>\jre\bin directory (or the \jre\bin subdirectory f your current J2SDK directory.)

3. Place the comm.jar in <jdk>\jre\lib\ext.

4. Place the javax.comm.properties in <jdk>\jre\lib.

5. Do not alter the CLASSPATH.

I ran this on XP with 1.5.0 and 1.4.2 and both gave the same exception. What can I do to fix this?

[707 byte] By [customhovercrafta] at [2007-11-26 17:24:54]