I am using Nokia C3-01 mobile phone from one year and i can say that it is very nice mobile phone. I was able to transfer my files on my computer with the help of USB cable and all the things was working properly but suddenly it has started giving me problem. now whenever I connect my phone with my computer it does not detect it. I have tried connecting my phone with the different USB ports as well but that does not helped me to solve this problem. I have also tried different USB cable but result was same. What should I do to solve this problem?