Your link doesn't work, also you can try to see how yours stacks up on hot pads. Little more detailed then zillow maybe cross reference w/ craigslist (but be warned craigslist ads can just be left up and not updated).
I have Have always learned that its product versus price issues . If people are not calling on the property then it's a priced problem, if they're not coming coming to the property then it is a problem with the product. With so many avenues to market these days I would be curious where the agent is listing the property are they doing YouTube videos are the meta-tagging / geo-tagging / are they using keyword search optimization there's a lot of things that they could be doing and instead of just putting it on the MLS. Being proactive in getting as many people as possible is the key.
My opinion is get it rented get it leased and get revenue coming into your property and worry about it next time.
if that house it's more than a month vacant you've probably lost a whole years of cash flow putting someone in the property is not just a financial but it's also a mental stress issue. Try to get the properties leased to be up closer to spring time so that you don't try to Lease it during the down months. That may mean make the lease 14 months not 12 as an example