problem of middle button in xfig

[Qisu Zou]

Hi,    I have a problem with the middle button of the mouse  in xfig 
with cygwin.

    Dell Work station, Windows2000,  cygwin  1.3.20-1,   xfig  3.2.4,

    It works to draw rectangular, circle, but as has problem to draw 
lines,  clicking left button starts  to draw a line, the upper right of 
the xfig window indecates that the middle button sets the final point, 
but  clicking the middle button does not have any effect, the line is 
continue to be drawn. The right button cancels the drawing.  I have 
tried emulating 3 button, did not work.  The middle button is set as 
"paste" from control pannel.

    xfig works in my laptop,  with windowXP,  cygwin 1.3.19, xfig 3.2.4.

    Appreciated any help.

    Thank you
     Qisu Zou