BDD2007 and WinPE2004

Hi,
I have a problem with adding Windows PE to the Deployment Workbench.. I have
generated Windoes PE 2004 ISO (using OEM Preinstallation Kit) and when I try
to Add OS (generated WinPE) to the Deployment workbench it all goes fine
(files are copied to Distribution\Operating System folder, there are no error
messages) but then no OS is displayed in the Workbench...
And I need some Windows PE visible in OS field to generate OSD Deployment
Point..

Do you have some idea why added Win PE is not displayed??
Thank you, Martin