Rename property name in build.xml

I have some problem in renaming property name in ANT build.xml file. I have a property named "dest" like this:

]]>

and it's used here:

<javac srcdir="$" destdir="$" debug="on"
classpath="$\ConnectionPool.jar;$\classes12_01.zip;$;$\AdventNetSnmp.jar;$\AdventNetSnmpDistributedAPI.jar"/>


When I tried to rename "dest" to "classes", only the last "dest" is renamed to "classes".

OS: Windows 2000
Build: 676