Ride check to negate hit while using mount for cover

[Beowulfe]

If you drop to use your mount as cover and then before your next turn where you can recover, can you use the Mounted Combat ability to make a Ride check to prevent the hit?

Using mount for cover says you cannot make attacks or cast spells, but does not mention this.

[Eridan]

Both actions are immediate actions but you only have one per turn. So the answer is no you cannot do both in one turn.