Cant get Explorer Perk

[TheGreatDoc]

Hi,

I have Outdoorsman at 150%.

I follow this conversation with Mantis in NCR Train Station:

-Hey, You look like the kinbd of guys taht's been around! Have you mapped out this entire are before?

-Sure do! What can you tech me?
(Here Mantis answers: Study this map. I'll only show you once. [You do so. You can now see all areas of the map!])

- Thanks! Thats all for now, goodbye.

But no Explorer Perk and no map revealed