How to configure ESAPI?

Hi,

I'm getting this error : Variable ESAPIENCODER is undefined.

my code is this:

<cfset esapi = CreateObject("java", "org.owasp.esapi.ESAPI") />

  <cfset esapiEncoder = esapi.encoder() />

not sure what I missed in the configuration.

I do appreciate any help.

Thanks in advance,

rdm