This may caused by following reason:

1 Not register

2 Password unavailable, you can use “forgot password” to find back your pass word.

3 Different site member, for example, you register on mmosale.com , your password can be used only on mmosale.com , if you want buy something on mmosale-fr.com ( our French site ), you need register on mmosale-fr.com.

Related articles：        

Why Register?

How to create an account on mmosale.com?

Forgot your password?

Membership Rewards。

How to order and order process。

About payment。

Or you want:

Buy World of warcraft gold EURO。
     
Buy World of warcraft gold WoW US。