Minimum Spanning Tree

There was an error in the file... an extraneous comma.  That's taken care of. 
however, my tree prints out an image that doesn't seem like a mst.  Attached
is the csv file I used... 
http://www.nabble.com/file/p22938299/sp_matrix.csv sp_matrix.csv 

I'd like it to look something like the image file also attached...
http://www.nabble.com/file/p22938299/2006-08-27_MST.png 2006-08-27_MST.png 

Is there a different layout that would accomplish that?  Or if not that
exactly, one that would help make the results a little clearer?

Thanks for all the help!
~josh

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