Hi Gunther,
Glad to hear you got it working... I remember having the same problem in Abode Acrobat 5. I found that adobe acrobat 6 and 7 work fine.
I think, but dont quote me on it, that the @ symbol means font alias. I have tried searching myself but it seems google and altavista dont allow you to search for the @ character.
Kind Regards,
Richard Spurgeon.