My iphone won't charge or connect to my windows 8 dell desktop?

When i try to connect my iphone to my computer through the USB cord the charging little box on the top right corner of my iphone 4 keeps blinking and thats it, it won't connect or anything?

You may be using the wrong USB cord. Each phone uses a very different cable, even if the look the same.
If this cable has worked before it may now be damaged.

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