portal authentication against DA with one-way trust relationship

Hi,

We are trying to configure following scenario:

One SAP Enterprise Portal 7.02 in DMZ authenticating againts one external Microsoft Active directory which is configured with one-way trust relationship with an internal

Microsoft Active directory.

We are able to log with external users but can't log with internal users.

We are suposing than with trust relationship between directories, authenticating with internal users should be trasparent.

I allready read 762419 and 673824 notes and tried Global Catalog configuration without success.

Has anyone implement this scenario?

Thanks in advance