[Q] Can't Connect with USB topic

I wear CM11 in, but lately, I can not connect to the pc via USB, I've installed the driver samsung, then I try to "mount storage" in CWM, still can not
Strangely, when I try flasing original stock rom with Odin, DOWNLOAD MODE is not connected / unreadable in Odin.
This is called a brick?
What should I do?