Technic saying Im using the wrong version of java but im not

Well I just tried to use technic to play with my friend but it just said that im using the wrong version of java. It said I need java 7 but I checked but I was on java 8 so I instaled java 7 instead. Same error. I dont know what to do at this point. Please help.
"Im sorry if I posted this in the wrong place"