Hi Laura, Richfaces 4 requires JSF 2.0 which is part of the EE 6 standard, you will need to use an EE 6 compliant application server such as Glassfish 3.1 (support available from Oracle) or JBoss Enterprise AS 6 (not yet released, but will be based off JBoss Community AS 7).
I already use JSF 2.0 , weblogic support 2.0 version as Nick said in his blog. The problem is related to RichFaces. It seems there is a bug in weblogic 10.3.3 version, and i can't upgrade it to 10.3.4. I hope there is a workaround to make richfaces work, otherwise i have to give it up. Someone has the richfaces 4 running properly in weblogic server 10.3.3. ?