temporary files location when converting to hyper-v machin not placed in alternate location

I'm running ABR 11 and have a problem with available disk space when converting backups to virtual machines in an 2008 R2 core Hyper-V host.

I've read kb article http://kb.acronis.com/content/8032 and modified the registry setting for snapshotstorage to use another local disk and folder for temporary files.

I've recreated all backup jobs (with the same name as before) as the article says.

Still the temporary files for conversion are placed in c:\Users\Acronis Agent User\AppData\Local\Temp on the hyper-v host that does the conversion ! :-(

Now the backups goes well , but the conversions fails due to to low available disk space. Anyone that can give med some advice on how to fix this ?