axis doesn't generate wsdl automatically

[Dario Di Minno]

I wrote a doc/lit web service, I deployed it, but appending "?wsdl" to 
the url of the service I can't get the wsdl;
I get a HTTP 500 error instead.

I've read that someone puts the wsdl file in the filesystem, but I'd 
like axis to build it when I ask to do so.

Can you help me?
Dario