Euro light adjustment ?

["Smeins, Larry" <lsmeins@service.ball.com>]

I finally got the new Euro lights in my 87 5kcs.  When I tried to adjust
them the top adjusting knob had no effect.  The lower knob adjusted
vertical alignment well.  I think there was a post here on this problem
some time back but haven't been able to find it.  Any tips on getting
horizontal adjustment working or a pointer to the previous post would be
appreciated.  Fortunately the horizontal adjustment is close enough for
use as is but would like to get them "right on".  

Thanks in advance,

Larry