WorldPortal and Uskyblock

This disscussion might have come up els where, but I dont have time to go through all of the forums..
WorldPortal
I downloaded the plugin world portal, and I was trying to setup a sign portal to my skyblock world (skyworld). I had gone through the steps /wp create, clicking the sign, and typing in the world "skyworld". I got to the point where it said chose from normal, nether, or end. I spelled out normal and I clicked the word, but the command just isn't working... Am I doing something wrong or is it the program? please help
Uskyblock
This might be a stupid or very unrelated question, but is there a way to protect islands in the plugin Uskyblock without the risk of getting another plugin that doesn't work to my expectations?