You will need to configure the boot order to either the CD/DVD drive 1st and the SSD 2nd or the other way around.
To change Boot Sequence in your BIOS
Reboot the system and at the first POST screen (where it is counting up memory) start tapping the DEL button
This will enter you into the BIOS/CMOS area.
Find the Advanced area and click Enter
Look for Boot Sequence or Boot Options and highlight that click Enter
Now highlight the first drive and follow the directions on the bottom of the screen on how to modify it and change it to CD/DVD drive or the SSD.
Change the second drive to the C or Main Drive
Once that is done then click F10 to Save and Exit
You will prompted to enter Y to verify Save and Exit. Click Y and the system will now reboot with the new settings.
I hope this gets you sorted and let us know how it goes.