Track Volume Simple Question

Hey everyone,
I’m a rookie at recording/editing/mixing so i need some help. i’ve learned that when recording anything, the input decibel level shouldn’t exceed -6. except when i do that, my final product obviously comes out extremely quiet! i mean i have to crank my computer volume all the way up just to hear it properly! what am i doing wrong??? thanks!

So … which version of Cubase are you using?