Crystal Reports ActiveX Designer can't connect to Oracle 10g

[Big George]

Hello,

I'm working with Visual Studio 2003 .NET and Crystal Reports for .NET.
Database: Oracle 10g
Develop PC: Windows XP

I'm having problems trying to design a Crystal Report connecting to
Oracle 10g using Microsoft OLE DB Provider for Oracle. I got this
error:
"ADO Error Code 0x80004005"

The problem is using Crystal Reports ActiveX Designer.

There is no problem of connection in my web app:

Imports System.Data.OracleClient

Dim oraConexion() As OracleConnection
oraConexion = New OracleConnection("user id=oropread;data
source=desaopint;password=oropread")

That's ok.
But the Crystal Reports ActiveX Designer can't connect to Oracle.
What should I do?
Thank you!