Renewal information

hi! please help me. i'm a foreign graduate also and took my nclex-rn exam for new york last oct 2006 in hong kong. i already receive a letter with my picture on it and stating that i passed the nclex-rn exam for new york. my dilemma is that i didn't receive my license number.. i'm worried that i might not be able to renew my license for new york, because my friend told me that nclex is only good for two years.(is that true?)