Rt-2-0-15 Install- problem with web

Hi all
I am a newbee at all of this .
I installed and met all requirements and didn’t seam to have a problem
until I went to
Go and view the web interface. At this point all I get is a download
panel to download a file .
Im sure I installed everything the correct way .Does any one have an
idea on how to fix this PLEASE.