CLR programming in SQL-Server problem(System.InvalidOperationException: The 'OraOLEDB.Oracle' provider is not registered on the local machine)

I need to communicate between oracle and mssql. I use CLR in mssql and this exeption :

A .NET Framework error occurred during execution of user-defined routine or aggregate "Function1": System.InvalidOperationException: The 'OraOLEDB.Oracle' provider is not registered on the local machine. System.InvalidOperationException: at System.Data.OleDb.OleDbServicesWrapper.GetDataSource(OleDbConnectionString constr, DataSourceWrapper& datasrcWrapper) at System.Data.OleDb.OleDbConnectionInternal..ctor(OleDbConnectionString constr, OleDbConnection connection) at System.Data.OleDb.OleDbConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningObject) at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup) at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) at System.Data.ProviderBase.DbConnectionClos开发者_StackOverflowed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) at System.Data.OleDb.OleDbConnection.Open() at UserDefinedFunctions.Function1()

Install relevant Oracle drivers

Exactly as it says:

The 'OraOLEDB.Oracle' provider is not registered on the local machine