Okay, so I'm in Rebenda Te Ra and I'm stuck at this one door where I have to get shocked with Thundara by a skeleton to get the door to open. Every site I look through the walkthrough says the door should be opnening if I get shocked by the skeleton. But for some reason the door won't open. I have gotten through before but I don't remember what I did to get the door open. Anyone know how to open it?