It can be a bug (in BS.Player, not in the skin)
I have 4 versions of blade skin, and the only one working is the one with scroll bar, the others have scroll button, and if you click on a position the scroll button comes back to the currently playing position. The only way you can make it work is to click on the desired position and then move the cursor a little left or right..
(the same thing hapens with NightRider_03Apr2006 skin since it also has a scroll button)
I'll add it to the bugs section