Not getting backend systems

Hi I'm new to VC and I'm trying to configure the backend systems to be used. I'm using a user that has been assinged the VCRole and has been properly mapped to the backend system (a R3 type system). However I don't get any system in my list of backend systems.

I have to use the administrator user, because it is the only one that sees the list of systems properly.

Do I have to configure anything else? Any idea?

Thanks in advance.