Logic Pro 8, using two sound card

Hi, Is there anyone who could solve my problem as I am having Apogee Mini Me with firewire and Edirol UA-25. I m unable to use these two together as I have to switch from Preferences. The problem is the AES/EBU output from Apogee which I dont have and I want to fix the output from Edirol as Apogee does not have the analoge output and Edirol has midi as well. What can i do to use these these converter together but Edirol specifically for the out put and for the midi. Plz let me know