We're not in control of the station's teleport mechanism and can't talk to Viveca while we're away from the station. There's also the problem that we're teleported back only when we've truly taken possession of the Orb.
Also, given the station is meant to contain the orb and keep anyone from using it, I think it's likely that there are safeguards designed to keep unauthorized people out that we don't know about.
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Also, given the station is meant to contain the orb and keep anyone from using it, I think it's likely that there are safeguards designed to keep unauthorized people out that we don't know about.