Tag f:ajax não reconhecida

boa tarde a todos…

tenho um projeto jsf 2.0, richfaces 3.3.3 e facelets.

estou alterando as tags a4j:support para f:ajax mas a tag não esta sendo reconhecida (<f:ajax> Tag Library supports namespace: http://java.sun.com/jsf/core, but no tag was defined for name: ajax)

as versões que estou usando são:

<dependency>
		<groupId>com.sun.faces</groupId>
		<artifactId>jsf-api</artifactId>
		<version>2.0.3-b03</version>
	</dependency>

	<dependency>
		<groupId>com.sun.faces</groupId>
		<artifactId>jsf-impl</artifactId>
		<version>2.0.3-b03</version>
	</dependency>

	<dependency>
		<groupId>com.sun.facelets</groupId>
		<artifactId>jsf-facelets</artifactId>
		<version>1.1.14</version>
	</dependency>

	<dependency>
		<groupId>org.richfaces.ui</groupId>
		<artifactId>richfaces-ui</artifactId>
		<version>3.3.3.Final</version>
	</dependency>

	<dependency>
		<groupId>org.richfaces.framework</groupId>
		<artifactId>richfaces-impl-jsf2</artifactId>
		<version>3.3.3.Final</version>
	</dependency>

alguem tem idéia o que seja?

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