Mturk worker Sandbox does not show HIT interfaces of my own Sandbox deployed projects

I am using mTurk requester Sandbox to deploy a project and mTurk worker sandbox to verify the project and generate some results. The project successfully deploy at requester sandbox and I can view the interface as well. However, when I login using worker sandbox and try to accept the HIT, it downloads an HTML file of project into local computer instead of showing the interface of HIT. If I open the HTML file in browser I can see the HIT with populated data from CSV file. However I am unable to generate any results.