Hi,
I guess that your code is based on the http://support.smartbear.com/viewarticle/70743/ help article and you made it too complex. :)
Manual creation of requests is a rare thing with TestComplete and may be needed for a few special cases only (e.g. when testing asynchronious web services). In all other cases Web Services Editor is very useful and assists in creation of a simple and clear test code.
I would recommend to start from http://support.smartbear.com/viewarticle/68323/ topic and follow the recommendations.
If you can post here or send me (via the forum mail) the WSDL file for your web service I can provide you with the sample code.
