ny2flma

Hello, I'm new to recording so any help is appreciated. I have a Line6 Spider IV 150amp. I am using the Scarlett 2i2 as my interface. I have everything plugged in correctly but no sound through my Monitors. I don't think i downloaded what i needed from Line 6 into my iMac because i had bought my Spider Amp prior to getting my new iMac. Any ideas of what downloads i need to install to get up and running???