[texworks] PSTricks problem

[GeorgeFLeCompte at comcast.net]

Im using texworks under Windows Vista Home Premium. 

File Simple.tex is taken from LaTeX Graphics Companion section 4.6. 



When I attempt to run it i get messenges ending in: 



! Undefined control sequence. 

<recently read> \c at lor@to at ps 



l.12 \ncline{A}{B} 



? 



I can't relate this to the program.  Please help or stear me to a more appropriate site. 



george
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