Hi my account is linked to my friends account but I cannot summon her, it still shows the icon beside her name in my friends list and everything I just can't click on it, why is this happening?

From: http://us.blizzard.com/support/article/20588

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Q u o t e:
Are there any limits on when and where I can summon my friend?
You may summon a recruit character once every hour; recruit characters may also summon you on a one-hour cooldown. Although the ability to be summoned ceases at level 61, characters of this level or above may still summon their friends as long as the summoning target is level 60 or lower.

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Quoting for truth (and for clicky!).

Apologies for any confusion, Nidodragon. I hope you and your recruit are still able to enjoy the Outland, though!