Can't add second mailbox to outlook 2007

Hi, i want to add 2 exchange mailbox to my outlook 2007. The problem is that i have 2 mailbox with almost the same name.

ex: Name Name

And

NameName

The only difference is that there is no space in the second one. So i can add the one with the space, but i can't add the second one without the spaces.

Can anybody tell me how to solve this problem?

Thanks.