Your camera was not supported until Lightroom 5.6.
So you need to purchase LR 6/Lightroom CC (or if your operating system won't run those, you could also purchase Lightroom 5 from Amazon and then update for free to 5.7.1)
Alternative plan: download the FREE Adobe DNG converter version 8.6 or later and then use that to convert your RAWs to DNG, then import the DNGs into Lightroom 4.4.
Okay. That's what I was afraid of. I guess I will go ahead and take the leap of faith and purchase the photographer package of CC.
Thanks for your help.