Please check first that you have bundled .jar containing javax.validation.MessageInterpolator class with your application.
hi I checked the richfaces-ui- 3.3.2 SR1 jar
and there is no MessageInterpolator class
on the path
richfaces-ui- 3.3.2 SR1 jar ->org->richfaces->validator
Yes, it's not there. You should add validation-api.jar to your application classpath yourself.