ORA-06413: Connection not open, works fine in Visual Studio C# but gives error in Installer

I have developed an application that uses Oracle Database to insert/query. Application works fine when I run using Visual Studio, but when I create its MSI Setup using Visual Studio Installer or Inno Setup Creation, it doesn't connect to Database and gives error on OracleConnection.Open().

Here is its full exception message

System.Data.OracleClient.OracleException (0x80131938): ORA-06413: Connection not open.

at System.Data.OracleClient.OracleException.Check(OciErrorHandle errorHandle, Int32 rc) at System.Data.OracleClient.OracleInternalConnection.OpenOnLocalTransaction(String userName, String password, String serverName, Boolean integratedSecurity, Boolean unicode, Boolean omitOracleConnectionName) at System.Data.OracleClient.OracleInternalConnection..ctor(OracleConnectionString connectionOptions) at System.Data.OracleClient.OracleConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningObject) at System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options) at System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject) at System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject) at System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) at System.Data.OracleClient.OracleConnection.Open() at XML_Reader.Program.Main(String[] args) in D:\XML_Reader_11NOV2015\XML_Reader\XML_Reader\Program.cs:line 33