SAP Business One 9.2 web access external URL

Hi,

We are just testing SAP 9.2 with web browser access and it's great!

We need to test SBO via web browser outside our company but we have this error: after we redirect SBO server internal IP in our router, we can't access SBO externally via browser, since it always redirects to the internal SBO ip address.

We tried also to configure the external IP address in "External Address Mapping" in SLD but it does not work also:

Does anybody knows how to redirect it?

Thanks

mdias