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Kiwis can take up to 6 years before they are mature enough to produce fruit. You will have to be patient. I actually grow these as well and mine took 6 years before they blossomed.

They do not keep their leaves in the winter, but they grow so thickly that they often make a good cover even without the leaves.

They take up to 6 years to mature enough to bear fruit.

For the most part kiwi plants are quite hardy, suffering few problems, if any. The only thing I can think of is a fungal or bacterial leaf spot problem, most likely from water on the leaves. Humid conditions, overcrowding, and poor circulation can also contribute to leaf spot. Remove and destroy all the affected foliage. All leaf spot diseases can be controlled by decreasing or eliminating overhead irrigation, minimizing leaf wetness periods, discarding heavily infested plants, and applying preventive fungicide applications.

You are looking for hardy kiwi vine. The fruit are smaller than the tropical varieties but taste as good. Arctic Beauty and Issai are 2 I know of. This article has a few others listed:
http://growingtaste.com/fruit/kiwis.shtml

The female flower will have a tiny fruit inside the blossom. Males will not. Until they flower, however, you cannot tell the sex.

The female flower will have a tiny fruit inside the blossom. Males will not. Until they flower, however, you cannot tell the sex.