Plesk 9.5 backups on Windows failing

[PaddingtonC]

Plesk 9.5 backups are failing with error that ait is an invalid backup and data cannot be restored from thre backup. When I try to validate I get the error:

C:\Documents and Settings\Administrator\Desktop\CP4backup.verification\xmllint>x
mllint.exe --noout --schema "C:\Program Files\SWsoft\Plesk\PMM"\plesk.xsd "C:\Pr
ogram Files\SWsoft\Plesk\Backup"\cp4_info_1303081520.xml
file:///C:/Program%20Files/SWsoft/Plesk/Backup/cp4_info_1303081520.xml:3: elemen
t Envelope: Schemas validity error : Element '{urn:envelope}Envelope': No matchi
ng global declaration available for the validation root.
C:\Program Files\SWsoft\Plesk\Backup\cp4_info_1303081520.xml fails to validate

After trying to edit the xml file , I get this error:

C:\Documents and Settings\Administrator\Desktop\CP4backup.verification\xmllint>x
mllint.exe --noout --schema "C:\Program Files\SWsoft\Plesk\PMM"\plesk.xsd "C:\Pr
ogram Files\SWsoft\Plesk\Backup"\cp4_info_1303081520.xml
file:///C:/Program%20Files/SWsoft/Plesk/Backup/cp4_info_1303081520.xml:49445: el
ement sapp-param: Schemas validity error : Element 'sapp-param': This element is
not expected. Expected is one of ( content, sapp-spec ).
C:\Program Files\SWsoft\Plesk\Backup\cp4_info_1303081520.xml fails to validate