Salary Review

Hi I Have been with this Company for already 12 months and on my contract it says that just after my three months probation, my salary will be reviewed. I was an employee here before and I resigned for a job over sea. Now that I'm back I saw the advertisement again last year and they are looking for someone that will be easy to learn and adopt the systems and working programmes easily, so I applied and got the job again. When I started no one trained me, because I already knew how their programmes and the system in workplace is going on. I went there sat straight on a new computer and directly interfere with clients on the spot. I even had to train few new hired ones as well. From that time till now I never received any salary review from the company, but it says clearly on the signed contract that after three months it will be reviewed. The contract is with me still. Please advise me how I should write to my Boss about this.

Please write me a Better "salary Review" letter and send it back to me.