Reliance SIM — sim is not recognizing in any mobiles...

my number is [protected] gsm,reliance prepaid,my name is ramasubramani...I bought this sim in coimbatore,my sim was in active in tamilnadu...But when i entered into karnataka sim is not recognizing in any mobiles...whenever i try to insert my sim i'm getting message "insert sim card"(...I called some of the reliance customers also,but they couldn"t solve the problem,I'm not able to use my sim for the past 10 days...I need a immediate solution for this problem,Thank you...