According to the manual...
[quote:1v05e32i]To scroll, the size of the layout must be bigger than the size of the window, or the layout's Unbounded scrolling property must be set to Yes. Otherwise there is nowhere to scroll to and scrolling will have no effect.
Your layout's width is currently set at 2 and the Unbounded scrolling is set to No.
You also have a SCROLLTOPOINT with ScrollTo behavior that is affecting the player's ScrollTo.
Setting your layout's width to 6192 and disabling the SCROLLTOPOINT seems to have fixed it.