[maplab-users] preview problem

[webmaster]

Hi All

My name is Carlos and I am new using maplab.
I have some problems when I try to see a preview. My map file (generated 
by maplab 2.2) says:

MAP
  NAME "paso"
  STATUS ON
  EXTENT 5637703 6980268 5645282 6974849
  SIZE 400 300
  SHAPEPATH "pasopatria/shapes"
  IMAGETYPE PNG
  LAYER
    NAME "parcelas"
    STATUS ON
    DATA "pasopatria/shapes/parcelas.shp"
    TYPE POLYGON
  END
END

When I do a preview the rosa applet work but it dont show me anything. I 
want to know if my mapfile is incomplete or it's a scale problem or what 
information I have to complete to see the preview.
Where can I found a complete maplab's manual?. Thanks for your help.
(Sorry for my english)

Carlos