External Out of Office not working ?!

[Shelter]

Hi,

I already try this;

http://support.microsoft.com/default.aspx?scid=kb;en-us;262352

I still have users on Exchange 5.5 on the same site.
The OoO for this server (5.5) is working.

The 2K server is SP4 for windows 2K and SP3 for Exchange

Thank you