Invalid OVF (OTN Developer Days.ovf)

I downloaded the three files from http://www.oracle.com/technetwork/database/enterprise-edition/databaseappdev-vm-161299.html.
When I open the .ovf file the Virtual Box manager displays an error:
Resultaat code:
VBOX_E_FILE_ERROR (0x80BB0004)
Component:
Appliance
Interface:
IAppliance {7b148032-4124-4f46-b56a-b48ac1273f5a}
I downloaded the ovf using various browsers, but the result did not change.
I am running virual box 4.0.10 r72479 in Windows 7 Ultimate, 64 bit version.
Has anyone encountered the same? How can I solve this?
Best regards,
Jan
Edited by: JayBee on 9-jul-2011 10:13

ORA_Patel - yes I have done the save as .ovf, but the problem is there is no file found to save. I got either a "unauthorized" html page returned from oracle, or Firefox/IE would return an error saying it could not download/find the find I right-clicked to save.
It looks like (from checking a wget) that a redirect happens and the actual file attempted for retrieval is:
http://edelivery.oracle.com/otn/other/virtualbox/dd/OTN Developer Days.ovf
When I went to check edelivery, it appears to be down right now.

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