nav frequency disagree?

[Guest esperienza]

Why do i keep getting efis/nav frequency disagree in mcdu when I swicth to approach mode?What does that mean and what am I doing wrong?I believe the nav frequency for the localizer are both correct in nav 1 and 2.Thanks for your help,David

[imoore 1]

Hi David,Do you have the switches turned to VOR on the MCP Control Panel (I believe that's what it's called. It's the panel where you change the navigation display range, etc.)