HeartGold Version: Gym Leader Blue's PokeGear Number

It turns out that getting Daisy to massage your Pokemon 5 times and get Blue's number is not what you have to do in order to get the above mentioned PokeGear number. Can someone tell me how to obtain the number?

After the five massages, you have to show her a Pokemon full of happiness. Then she'll give you the number. You can call Blue during Sunday night to arrange a rematch ;)