System.Net.Sockets.SocketException (0x80004005): A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 192.168.20.75:5432
   em System.Net.Sockets.Socket.InternalEndConnect(IAsyncResult asyncResult)
   em System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)
   em Npgsql.NpgsqlClosedState.Open(NpgsqlConnector context) na c:\Desenvolvimento\NpgsqlBuildOficial2.0\src\Npgsql\NpgsqlClosedState.cs:linha 110   em System.Net.Sockets.Socket.InternalEndConnect(IAsyncResult asyncResult)
   em System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)
   em Npgsql.NpgsqlClosedState.Open(NpgsqlConnector context) na c:\Desenvolvimento\NpgsqlBuildOficial2.0\src\Npgsql\NpgsqlClosedState.cs:linha 110