Allowing Linkedin for a specific User

Hello,

i have a Fortigate 200B with Firmware release 5.2.5

Linkedin, as other social networks, are blocked in my company.

I have been asked to open Linkedin for a single specific user.

I have created LDAP users  as we have Active Directory.

I have done what in this article http://cookbook.fortinet....ng-web-filter-profile/

The only difference is that i have created users from LDAP server.

If i add the group in the policy (point number 4 in the article)...simply internet is blocked on all the network!

Another difference with the article is that my policy that allows internet has already "Security profiles" fields configured.

Any idea?

Thanks in advance