Issue with uploadify witj asp.net in a content place holder

Here's my issue.
I'm using uploadify. When I use it without master page it's working fine.
Now I'm trying to make it works in a content place holder (and a master page)

My problem is I can't call uploadify methods anymore... For instance if I set 'auto:true' it will work.
But I want it to be false and then call uploadifyUpload(). And that's the problem... It won't be called with the masterpage but it will without...

Anyone has an idea?

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