imagePROGRAPH custom paper size and network printer

Hello,

I have:

Windows 2008 R2 domain controller + print manager

the clients are Windows 7 x64 and domain members

3 Canon printers

1 iPF710

1 iPF 770

1 iR-ADV C5051

And I want to deploy my printers through group policy.

All network printers are displayed at the clients with the right printing settings from my server.

If I create a custom paper size on the server for the iR-ADV, it is transfered to the clients.

Only the custom paper sizes of the iPF printers are not available at the clients.

I already investigated the problem and found out:

At the client, I can find my missing paper formats in the registry in the key

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Print\Providers\Client Side Rendering Print Provider\Servers\SERVERNAME\Printers\{SOME-GUID}\DsDriver\printMediaSupported

But there is also a file on the server with my custom paper sizes:

C:\Windows\System32\spool\drivers\x64\3\GARO1\Canon iPF770\CNWW77JM.UDG

And this file is not transfered to the clients (both iPF710 and iPF770).

Why? Firewall? Access rights? ...?

Please help me