URGENT! Why doesnt logic ProX, profx8, and mbox mini 2 record?

I have all my equipment set up and all working as in i can hear my Mackie mixer on and i see that my mbox mini is connected on Logic but when i record nothing gets recorded! Yet everything is working fine i can hear the Fx from my mixer and logic recognizes my mbox so why cant i record? please help ive been at this for weeks! Thank you for your time.