I cannot find my iphone4s on itunes 11.1.1
I cannot find my iphone4s on itunes since itunes 11 version.
and then I update it to the latest 11.1.1. and hope that I can find it. But it is not.
I try to change my usb cable; doesn't work.
I try to plug in - plug out many times; doesn't work.
I try to restart the service in control panel.(Refer to Apple's instruction); doesn't work.
What should I do? Thank you in advance.
Remark: I haven't update my iphone to the ios7 yet. Because I saw that it doesn't work well on other device.
iPhone 4S, iOS 6.1.4