.net website publish

I have made a feedback page in .net 4.0 using visual studio 2010. When I check it in browser it works well and sends a demo feedback to my website email address. But, after I published it and uploaded to my server (byethost) through filezilla ftp, my feedback page is not opening in any browser.
I want to make it clear that I am not master (expert) in .net

Please help me.

Thank You