Download backup problem

[Dani 10110]

Hi,
im using plesk 9.5.5 for windows,
when i try to download plesk backup i have this error:

Unable to find Backup dump object
---------------------- Debug Info -------------------------------
0: backup.abstract-repository.item.php:64
__backup__abstract_repository__item->getDump()
1: backup.abstract-repository.item.download.php:35
__backup__abstract_repository__item__download->accessItem(string 'GET', NULL null)
2: UIPointer.php:601
UIPointer->access(string 'GET')
3: plesk.php:47

i found a patch for Linux but nothing for windows, ( http://kb.parallels.com/6047 )

please help me to fix it,

Regards,