I have build a small project that connect unity3d with postgreSQL database.Before I build the project, I can get information from database using Npgsql.DLL and system.data.dll. However, after I build it as a exe file or publish as a webplayer, it didn't. It can't read data from database!

I have seen the database configuration, it permits remote access. So it may not be the problem. In my project, I did not use WWW class to transmit data ? could this be the reason?

Please help me if you have any idea.