wap-wml-parameters to database servlet

[SUBSCRIBE SERVLET-INTEREST Lucy]

Hi
I've adapted a servlet I use OK for database access, from html to wap.  It collects 
parameters input by the user sends to database servlet and returns data.  I've 
rechecked the servlet coding and I'm sure it's OK, but I'm wondering whether my normal 
servlet approach can be causing problems for wap.  I use "PreparedStatement" and 
underscore_ in parameter (variable) names.  I've tested without the underscore_ but 
have got no improvement.

The .wml file is obviously accessing the servlet as it returns the
correct title from the out.println object, but none of the parameters.  I've checked 
wap articles (eg Mahmoud) but they don't cover this, and wasted 30 quid on new book 
Evans & Ashworth (useless) it amazingly deals with only flat files and glosses over 
any intracacies.
1.  Can I use PreparedStatements in servlets/database/wap?
2.  Do database rows with underscore_ in parameter_name upset wap?
3.  Is it my wml that's dodgy? The user has to physically input some text which is 
then sent to servlet to search the database.
4.  Can anyone recommend any decently pitched articles/book?

Dodgy wml?:
<?xml version="1.0"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN"
"http://www.wapforum.org/DTD/wml_1.1.xml";>

<wml>
  <card id="MyCard" title="Enter search">
     <p>
      Enter Search name:
      <input type="text" name="search" />
  </p>

    <do type="accept" label="Enter">
      <go href="http://localhost/servlet/MyDBServlet"; method="post">
  <postfield name="search" value="$(search)"/>
   </go>
    </do>
 </card>
</wml>

Thanks for any help.  Cheers, Lucy

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