[Users] windows VM console

Hi all, I recently imported in oVirt a Windows 2003R2 VM which previously ran on virt-manager/libvirt/KVM. All right (almost). The only weirdness is that I'm unable to have a VNC or SPICE console. Clicking the green terminal icon in webadmin makes me download a .rdp file regardless of what I have set in the VM's definition. Can anyone tell me what controls the production of a .rdp instead of a .vv? I think this has something to do with virt-v2v because other windows VM directly created in oVirt behave properly. What could I investigate more? Which config file? TIA, Giorgio.