Is really hard to help you if you don't show or explain what you've tried, so please read How do I post a question effectively?

If I had to attack a problem like that ( send only one type of request ) I'd use Template::Toolkit to generate the request, in combination with Mime::Base64 to encode the file you are trying to upload, then I'd use LWP::Useragent to send the request to the server and finally if you need to parse the response you could use XML::Simple or XML::LibXML or XML::Parser