How do I help my downloadable program become trusted by File Insight

Help!!  I have a program, an .exe file, that I made downloadable and available for sale from my Web site.  I scanned the .exe file for viruses to make sure it was safe before I put it on my Web server.  However, if I now download the file, File Insight of Norton Antivirus points out a couple issues.  It says "There are very few users." and that "There are many inications that this file is untrustworthy and therefore not safe."  So File insight automatically removes the file if I try to download it from my Web site.  What indictors does it use, and what can I do to make my new program more trustworthy so it is not automatically removed?   Automatically deleting my new program from the computer of anyone who tries to download it is a severe issue and will make it impossible for me to sell my program!!

 

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