Plot function fails to plot and closes (exits) scilab

[kaprielkrikorian at aol.com]

I am a new user of scilab. I downloaded scilab 5.3.0 64 bits on a windows 7 home premium (64 bits) computer. I wrote a simple program that computes y as a function of x (e.g. y=sin(x)). The program computes correctly and prints x and y. However, when it comes to the plot function it fails to plot and closes (exits) scilab 5.3.0. Similarly, anytime I need graphics, such as the demonstrations (provided with the scilab download) that use graphics, I am unable to get plots/graphics and scilab closes (exits)
Would you please let me know if I am missing something or if  there is a fix for this problem. My e-mail address is: kaprielkrikorian at aol.com.
Thank you very, very much.
Kapriel
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