Blocking exe file

I have written an application and created a .exe file. When another user try to download and install it Norton does not allow him to do it (no problem on pc’s with avg installed).

Is there any way of getting my program added to some sort of white list to prevent Norton blocking it? Or anything I need to do in my code to prevent it being blocked (I have just added code to connect to my SQL server and it has now started blocking the fold, whereas it was installing fine before).

Thanks
Garry