I can not get into runescape, I am mad!

Okay I am pretty sure that I should be able to get into a simple game but I can't it is so anoying! Gosh I thought you would want people to play your game but no you just have to tell me I'm not eligable rahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!