Ruby-Net-Lap - Problems to Search

I'm using the ruby-net-ldap to connect in the Active Directory. I'm able
to connect but for some strange reason when i try to do any search
nothing is returned.

Follow the code:

     username = 'user'
     password = 'password'
     ldap = Net::LDAP.new(:host => 'host', :port => 389, :base =>
'dc=domainname,dc=domain')
     ldap.auth(username, password)

     if ldap.bind

    puts "# authentication succeeded"

    filter = Net::LDAP::Filter.eq('name', "steven*")
    ldap.search(:base => "dc=domainname,dc=domain", :filter => filter)
{|entry|
       puts "found"
                }

     else
    puts "# authentication failed"
     end

The console show "# authentication succeeded" but "found" never is
printed

Someone already had some problem like this?

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