Galaxy Y wifi not woking topic

Hi guys, I'm new here. I've a Galaxy Y s5360. Once I installed Cyanogen in it. But now I have returned to Stock room. But I have found thaty wifi is not working anymore. When I on the wifi, it shows scanning and scanning and scanning. It can not detect any network. Moreover, the hotspot is also showing error. I've free wifi at my college, but unfortunately I can't use it. Hope you guys can give me a solution. Thanks in advance.
Sent from out side of the Galaxy