Account converting FAST FAST FAST HELP PLEASE!

I played on this warmane and i have my gnome on my account i think 70-80 level,and then i deleted wow because i didn't have memory for this game,after that i bought new memory and now i can play but i have problem with my account i cant login i know my username and my pass
but when i type my password in mop 5.4.2 its on my screen : ''This account needs to be converted to a Battle.net account.Please [click here] or to go on their link to begin conversation,i dont know really how to fix this or i dont know,maybe its new update,please ANSWER with love older WOW player <3 :)

PICTURE ------ //imgur.com/edit

http://forum.warmane.com/showthread....unt-Conversion