Connection Oracle database from UFT

Hi,

I'm new in UFT and I need to conect to a database. I added Oracle in the Add-ins and typed the next code:

 

DB_CONNECT_STRING = "Provider=OraOLEDB.Oracle; Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST="myhost")(PORT=1521))(CONNECT_DATA=(SERVICE_NAME="myservice"))); User ID="myuser";Password="mypassword";"

Set myConn = CreateObject("ADODB.Connection")
Set objRecordSet = CreateObject("ADODB.Recordset")

myConn.Open DB_CONNECT_STRING

In the last line fails and appears the next message:

Provider cannot be found. It may not be properly installed.

I saw in other posts people installed oracle client but I don't know if it's strictly neccesary.

Thanks for your help!