Magento Web Service using SOAP API

We developed an E-Commerce website using Magento 1.9 version. We need to integrate Microsoft Dynamics GP with Magento using web service.

I followed the following URL steps to do that task.

And running that page in the chrome browser but getting the error like below:

In Firefox like this:
The character encoding of the HTML document was not declared. The document will render with garbled text in some browser configurations if the document contains characters from outside the US-ASCII range. The character encoding of the page must be declared in the document or in the transfer protocol.

Firefox params displayed like "No parameters for this request"

We need to pass values to the GP database and retrieve values from the GP database.

How to fix that issues?