Like Pattern Matching - Problem With Param

I've decalred this stored procedure with a simple where and like statement. The problem is I don't see any result.
Here is my code


create procedure sp_Select_ProfileNames
@NameSearch varchar(50)
as
select ProfileFirstName +' '+ ProfileLastName as ProfileName
from Profiles
where ProfileLastName like '%@NameSearch%';


When i change this line:
where ProfileLastName like '%@NameSearch%';
to
where ProfileLastName like '%Bil%';

I see names starting with Bil, but when i enter Bil as param, I don't get anything.

What's wrong here ?