problem with line layers

[Sergio Lopez]

I have a problem when trying to view map files via cgi-bin , they don´t
show line or point layers included in the map file, just the polygons.
However, when I use the same map file in maplab, everithing works as
intended. what am I doing wrong? the url I use is:
http://localhost/cgi-bin/mapserv_44.exe?map=/ms4w/apps/..../lp.map&mode=map
I´m workin on win xp sp2.
thanks in advance