Webservice Not Working After Publish

HELP!

I am working on creating a webservice that uses a .dll reference file from an application that then creates an XML output which will be integrated into SAP.

I have created a localhost website and the webservice, which works perfectly in visual studio 2010, however after publishing it to the IIS localhost I do not get the same return.

Furthermore as I am very new to VB I cannot debug the published website to see specifically what is happening. I have used a caveman style debugging technique and have found that it seems to have something to do with the functions within the .dll file that is being referenced. My gut tells me it is a security issue, but I don't know why it would be working fine in visual studio, but does not return any value after publishing.

HELP!

And thank you kindly in advance for any information.

Set up the WebService to use an AppPool with an account that has the necessary permissions.

The website I created on the IIS has the security permissions of an app pool with read & execute. the app pool also has permissions to the dll file as well.

In the visual studio project settings, set up the project to use IIS when debugging. See if you can repro the issue that way.