trouble with vector line

[Grzegorz Myrda]

When I use "styled" line it's OK.
But when I change to vector type symbol, roads disappear.
Is this something wrong in line definition (in line.sym) or layer definition
in mapfile ?
I'm trying this with the last version of mapserv.

My definitions:
[lines.sym]
...
Symbol #17
 Type ELLIPSE
 Filled
 Points
  6 6
 End
End
...


[Mapfile]
...
LAYER
 NAME roads
 DESCRIPTION Drogi
 DATA roads
 TYPE POLYLINE
 STATUS ON
 CLASS
   COLOR 255 0 0
   SYMBOL 17
 END
END
...


Thx,
GM