Al K., I'm speculating that house prices and even rents are going to have to cool off over the course of the next year, but I don't think that's the reason your house is still vacant.
My first thought is that the photos advertising the house are not as attractive as they could be in terms of lighting and resolution. The resolution of the pics don't fill the frame on sites like Zillow, so your pics (and the house) look smaller and dinky compared to the competition. Next time you get a chance, take the exterior pics during spring or early summer when the grass is green and all the trees have leaves. It might seem inconsequential, but it makes a difference when renters are scanning through tons of options and want a home that stands out as lush and inviting.
My other thought is that although it seems to be in good shape and has pretty good schools, it's still a 1970's property. Parents might be willing to throw their kid under the bus just a tiny bit in order to rent one of the many 2000's houses a mile away, even if it means their kid goes to a middle school that's ranked a 6 instead of a 7. They can get a brand new house that feels more open for maybe $50 more a month.
Your price is right at the Zillow Estimate. I'd try lowering $50 and see what happens. If you bought this house for $85k-ish, you should be sitting pretty even if the rent eventually drops to $1100. Finally, it's probably the slowest time of the year to be renting it out, so try to get a 6 or 18 month lease so that your next attempt is timed during the peak season. Hope this helps...