[Chicken-users] ssax examples could not run

[HP wei]

I installed chicken.4.7.0
and ssax, sxpath

Then I tried to follow the examples pointed to in the ssax homepage
in
http://modis.ispras.ru/Lizorkin/sxml-tutorial.html

Specifically,
When I run this in csi,
(use ssax)
(use sxpath)

(sxml:document "http://...html")

I got
Error: unbound variable: sxml:document

Another example, after installing htmlprag

(html->sxml
 (open-input-resource "http://....html"))
--> gives 
Error: unbound variable: open-input-resource

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Do I need to use wget in the shell to download the html page
and then come back to csi to parse it ??

thanks
HP