Broker URI configuration causing SAX errors

I have a JNDI configuration for an embedded broker in my Tomcat
context.xml,
I'm trying to use the broker uri syntax to configure the broker and having
varied luck.  My configuration works until I try to add the useJmx option
to
the URI.  When I add useJmx=false I get the following on tomcat startup:

SEVERE: Parse Fatal Error at line 37 column 134: The reference to entity
"broker.useJmx" must end with the ';' delimiter.
org.xml.sax.SAXParseException: The reference to entity "broker.useJmx" must
end with the ';' delimiter.>...at
com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195)

Can anyone help me figure out what I am doing wrong in my broker config
syntax? 

Here is my resource in tomcat:


<Resource name="jms/connectionFactory" auth="Container" 
    type="org.apache.activemq.ActiveMQConnectionFactory" 
    description="JMS Connection Factory Home" 
    factory="org.apache.activemq.jndi.JNDIReferenceFactory" 
    brokerURL="vm://localhost?broker.persistent=false" 
              brokerName="sharedAuditBroker"/>

The above works, but when I change brokerURL to:


brokerURL="vm://localhost?broker.persistent=false&useJmx=false"

or

brokerURL="vm://localhost?broker.persistent=false&broker.useJmx=false"

I get the error listed above.  

Thanks for any insight on this!