Export to PS Tricks TEX macro

I have two questions:
1. I've drawn with Dia a graph. Then I've exported it to PS Tricks TEX macro and I've compiled it.
And then it has come out the next error massage:
! undefined control sequence
l.20 \ pspicture
I've tried zu change the coordinate in the TEX-file, but the error massage came again.
How can I repare it?
2. How can I view the graph?

Attachment: Hochbegabung_Problematik.png
Description: PNG image

Attachment: Hochbegabung.tex
Description: Binary data

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