CA Final reregistration

I had cleared my CA Inter in 2005. Recently before one year i had revalidated my registration with ICAI as I have a old registration. Now I want to give the exam for CA Final. What is the next step to follow? Right now I am in KSA. I should apply for new course or old? I try to reach ICAI registered number for Mumbai, Delhi and Ahmedabad but no response. If you have some contact number please share with me and let me know the process so that I can start for CA Final.