Web Thin Client issues (Blank page in browser, ISSymbol control error)

Dear community I'm asking you for help in a chain of troubles I've been having during the development of a solution using Indusoft Web Studio. The information about my case is in the following lines:
-First I got a success configuring the IIS Web server for publish the Web App but I couldn't view the screen in the browser(Internet Explorer) with the Secure viewer I didn't have troubles. Trying to access by browser I only saw blank pages and didn't get any error(I checked the MIME types, the open ports 80,1234, the browser permissions to install and execute ActiveX controllers and the credentials IUSRS). Finally when I installed the ISSymbol.ocx file manually in the C://Windows/System32 folder I got the error "ISSymbol Control, Error 404 Server not found." I decided try something different so...

-I started to use the NTWebServer provided by Indusoft. The story is pretty much the same as the attemp with IIS, I acomplished the view in the Secure Viewer, but trying to access the screens in the browser the error I got is described in the screenshoot under this. I tought the NTWebServer would be my salvation because it's a "Zero Configuration" WebServer...
I need a solution for my Web Client access using a browser. Help me and I would be forever grateful to you.