TiledMapServiceLayer - "Tile load failed" error

[ScottMason]

On my development server (http), the layers load.

When I promote my code to User Acceptance (https), the MapService loads, but the tiles do not.
In Firebug, I can see the errors "Tile load failed <uri>" in the console.

Any ideas on what might be causing this or ways to figure out the problem?

Thanks,

Scott

Server : 9.31 on http
Client  : 1.2.0.177

[ScottMason]

Darn!  I should have read further.
1.  http://msdn.microsoft.com/en-us/library/ms602473%28VS.95%29.aspx indicates that cross schema calls are not allowed

2.  TiledMapServiceLayer.ImageFailed doesn't pass the exception on.

Any ideas for a work around.