Here are 2 possibilities why it may not be working:
The Azure Flute should always work on the first attempt or you had a corrupted code that makes the game assume you already used it. Check the two possibilities and try again.
Your Azure flute won't work because you are in the wrong area to use it. If you are in the water swimming your Azure flute won't work.
u have to go to spear pillar (where u got palkia/dialga) and play it. then arceus appear!
If you used it once, then it should work. If you hacked or cheat to get another Azure Flute and went back to Mt. Coronet to where Dialga and Palkia were, you cannot be able to do it again. Make sure it was your first try using the Azure Flute and you are where the Hall of Origin is.
to get the azure flute you have to you use a cheating device to get it because i don't know You can't get the azure flute in Pokemon soulsilver.
You cannot get the Azure Flute in HeartGold. The Azure Flute is only capable of being used in Pokemon Diamond or Pearl. The Azure Flute can only be obtained by an event of some sort in Diamond and Pearl.
Your Azure flute won't work because you are in the wrong area to use it. If you are in the water swimming your Azure flute won't work.
No, that does not work.
because you can only use it if you have wifi connected
it wont. you have to cheat to get it or use mystery gift to get the azure flute
No, that does not work.
u have to go to spear pillar (where u got palkia/dialga) and play it. then arceus appear!
you need the event for the azure flute.
If you used it once, then it should work. If you hacked or cheat to get another Azure Flute and went back to Mt. Coronet to where Dialga and Palkia were, you cannot be able to do it again. Make sure it was your first try using the Azure Flute and you are where the Hall of Origin is.
there will be an event in the UK of the azure flute. But it wont be until 2010
only with an event you can get the azure flute
go to the place where you got dialga or palkia. then you use the azure flute .go upstairs and you will see arceus and click on it you will battle him.
You must get an Azure Flute from a Nintendo Event.