Auth error using OData to read Sharepoint list

Hi,

I'm trying to read a Sharepoint 2010 list using an OData 2.0 source in SAP BusinessObjects 4.1.

Every time I test the connection I have the same authentication error

A problem occurred while communicating with the provider. Detailed message: Server error: (response: status=401, reason='Unauthorized', request='/myURL/$metadata')

I confirmed that the user name and password are correct, the same for permissions

I made some basic test and I can connect to my OData feed using Excel/PowerPivot and IE for example. Also, I can connect to "sample" OData feeds in SAP BusinessObjects (http://services.odata.org/V3/Northwind/Northwind.svc/)

Any help about it ?

Thanks!