How to view a .avi file in sequence editor?

I have created a simple animation of a moving cube with three frames and saved it as a .avi file . In sequence editor when i select add movies entry and try to select the .avi file a
vertical blue strip comes in the sequence editor. I am confused about where to place it so that i can view the .avi file in sequence editor and can apply effect to this file. Plz guide me.
Thanking you.
Sikha Devi
.

If you want it right at the start of the movie, move it so that it starts at frame 1. I usually split the sequence editor window into two - in one of them, select the preview mode under the combobox. Then you can see it.

Thanks for your suggestion ! I kept the vertical blue strip at frame 1 and in channel 1 .When i am trying to select it by Shift-RMB it is not being selected. So when i pressed Shift-D to duplicate the strip it could not be duplicated. Plz guide me how to select the vertical blue strip. I am working in linux and in blender 2.42.
Thanking you.
Sikha Devi

Just right-click.