Problems adding Java Persistence as a Project Facet

Hello!

I'm quite new to the topic. I've only started up creating web dynpros and integrating them to the portal. Now I'm following the SDN tutorial "Consuming EJB's in Web Dynpro for CE 7.1" see link: [Web Dynpro for Java|https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/b030e7fb-2662-2b10-0dab-c4aa52c3550b]

I'm having trouble on page 35 adding the Java Persistence as a Project Facet. I get an Error saying 2 things:

Java Persistence 1.0 requires Java 5.0 or newer.

Constraints for Java Persistence 1.0 have not been met.

I'm running Sap NetWeaver Developer Studio with jdk1.5.0_14

Can anyone help me with this one? Please? 😉 Thanks in advance!