From Oracle's official certification pages:
* If you received your assignment prior to the Oracle transition, September 1, 2010, please note that your assignment will be graded only if you are pursuing the current Java SE6 Developer certification track. We will not review assignments for certification tracks prior to Java SE6 Developer certification. To determine the version of the certification track for your assignment that was received before the Oracle transition, you can refer to the email that you received from Sun with the exam assignment purchase details. The assignment exam should be #310-252A and it must have been purchased after January 2008. If you don't have your assignment purchase email, you can refer to the date you purchased your assignment and the assignment was issued. Valid assignments must have been issued after January 2008. Any assignment that was issued prior to this date is no longer valid as it was for a retired certification track. If you wish to pursue the Java Developer certification, you will need to complete the requirements above.