Hello,
We have try upgrade Plesk to 12.5 but process has failed:
Installation started in background
Determining the packages that need to be installed.
File downloading PANEL-WIN_12.5.30/dist-msi-Microsoft-2003-i386/panel.msi: 10%..20%..30%..40%..50%..60%..70%..80%..90%..100% was finished...