SPICE Remote Viewer - no \ on Loginscreen ?

Hi,

I use a virtual Centos 6 Desktop under Proxmox 3.1 to join a NT4 Samba Domain (virtuell SME8), I can logon with the Proxmox-Console:

User: domain\user
Pass: password

I like to use SPICE but can not get the "\" ... ?



regards
fpausp