Different output from different server?

Hi all,

I have installed GNUPLOT 4.2 patchlevel 0 on 2 different machine...
Both of them having exactly same data and running the exactly same
command:

plot "/tmp/19291688680688-1.dat" using 1:2 t "Target Area" with
filledcurves below y1=119 ls 1,\
"/tmp/19291688680688-1.dat" using 1:2 t "Target=118.26" with lines ls
2

But, Machine 1 printed out the highlighted area, but Machine 2
didn't...

Is that because of some settings of the machines are different?
When I check GPVAL_COMPILE_OPTIONS:

Machine1: GPVAL_COMPILE_OPTIONS
"-READLINE +LIBREADLINE +HISTORY +BACKWARDS_COMPATIBILITY
+BINARY_DATA \n+GD_PNG +GD_JPEG +GD_GIF +ANIMATION \n-NOCWDRC
+X11_POLYGON +USE_MOUSE +HIDDEN3D_QUADTREE \n+DATASTRINGS
+HISTOGRAMS +OBJECTS +STRINGVARS +MACROS +IMAGE \n"

Machine2: GPVAL_COMPILE_OPTIONS
"+READLINE -LIBREADLINE +HISTORY +BACKWARDS_COMPATIBILITY
+BINARY_DATA \n+GD_PNG +GD_JPEG +GD_TTF +GD_GIF +ANIMATION \n-
NOCWDRC +X11_POLYGON +MULTIBYTE +USE_MOUSE +HIDDEN3D_QUADTREE \n
+DATASTRINGS +HISTOGRAMS +OBJECTS +STRINGVARS +MACROS +IMAGE \n"

Can anybody point me out what's went wrong?
Your help are very much appreciated...

Ivan

.