openamf and servlet?

Hi,
I tried to call servlet from java servlet but keep
getting a "NetConnection.call.BadVersion" error. And  
I still cannot find the reason that caused the error.
Among openamf examples, there is one clalled
SubmitToURL to subscribe mailing list. It just create
an URLConnection to the app server:
			URL url = new
URL("http://lists.sourceforge.net/lists/subscribe/[email protected]&pw=test&pw-conf=test"));
);
			URLConnection conn = url.openConnection();
			result = conn.getContent().toString();


If I wasnot wrong, I can replace part of the url
string with my servlet name. But does this mean I have
to pass parameters through url string? Is there any
othere way to pass the parameters like use post method
instead of get method for normal html page? 

I know flash remoting can get parameters using
"FLASH.PARAMS" and set parameters using "FLASH.RESULT"
in servlet. Does openAMF has any feature like that?

Thanks a lot!

sunonepp

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