Verify what data your server program receives. Print that data to a log file to inspect.
If your server program does not receive the data you expect, debug your client program.
If your program is not using CGI, please make sure you understand the difference between GET parameters and POST parameters and URLs.
Make sure that your server program can handle both, GET parameters and POST parameters. Read LWP::Request about how to send POST parameters.
Verify that what your server program decodes is what you expect. Print that data to a log file to inspect.
If your server program does not decode what you expect, post a relevant minimal version of your server program with hardcoded data so that we don't need a webserver or a client program.
Snippets of code should be wrapped in
<code> tags not<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).