I think it is a version issue to be honest. I can't use the most up to date version of RM-MV (1.6.3) as it wont let me play-test or battle test through the database. I'm not sure why it does this, it's a problem. When I switched to an older version (1.5.2) everything works correctly, but I have noticed some plugins haven't been working at all. If I had to guess, it's that.