Trouble with a build: CodePage 1250 not supported

Hello I got a problem, when i play a scene in Unity all is ok, but when i make a build out of it, it doesn’t work.
The not working part is the connection to the ms sql database,
The database is on my computer.
When i opened the log file the error was:

NotSupportedException: CodePage 1250 not supported
  at System.Text.Encoding.GetEncoding (Int32 codepage) [0x00000] in :0 
  at Mono.Data.Tds.TdsCharset.GetEncodingFromLCID (Int32 lcid) [0x00000] in :0 
  at Mono.Data.Tds.TdsCharset.GetEncodingFromLCID (System.Byte[] collation) [0x00000] in :0 
  at Mono.Data.Tds.TdsCharset.GetEncoding (System.Byte[] collation) [0x00000] in :0 
  at Mono.Data.Tds.Protocol.Tds.ProcessEnvironmentChange () [0x00000] in :0 
  at Mono.Data.Tds.Protocol.Tds.ProcessSubPacket () [0x00000] in :0 
  at Mono.Data.Tds.Protocol.Tds.NextResult () [0x00000] in :0 
  at Mono.Data.Tds.Protocol.Tds.SkipToEnd () [0x00000] in :0 
  at Mono.Data.Tds.Protocol.Tds70.Connect (Mono.Data.Tds.Protocol.TdsConnectionParameters connectionParameters) [0x00000] in :0 
  at Mono.Data.Tds.Protocol.Tds80.Connect (Mono.Data.Tds.Protocol.TdsConnectionParameters connectionParameters) [0x00000] in :0 
  at System.Data.SqlClient.SqlConnection.Open () [0x00000] in :0

And i honestly do not know what to do to fix it.

Edit:

I’m not using SQLite but System.Data.SqlClient
string connectionString = “Server=***\SQLEXPRESS;” +
“Database=Odyseja;” + “User ID=test;” +

					"Password=test;";
			;
using (SqlConnection conn = new SqlConnection(connectionString)) {

					conn.Open ();
	string select = "SELECT * FROM Planet";
	SqlCommand cm = new SqlCommand (select, conn);
	SqlDataReader dr = cm.ExecuteReader ();
	while (dr.Read()){// do something}

hope this clears things up

Well this is the top hit I got from searching: CodePage 1252 not supported - works in editor but not in standalone player - Unity Answers