Burning Crusade Help PLEEEEASE?!!!!?!!?

Ok this is kinda confusing so keep up (not really) I had WoW ok i got kinda bored so i intalled the trial for Burning Crusade, while i was installing it the bar stopped and it wouldnt move so i cancled the installation didnt get on WoW since tat . the next day i bought the reg burning crusade so i installed that just fine then when i went to put in the authentication key it said my account is already designed to play burning crusade or whatever. So i though *kewl i guess thats ok just as long as i get teh characters and the map of burning crusade* so tat day i played it made a blood elf paladin got to lvl 6 *kewl* . then i had to get off the computer. The next day i played burninc crusade with my loodelf it said Character has been locked please contact billing.Then i realized that, that day was the end of my BC free trial. Thats the thing i need help with i bought BC and it wont let me use it im not using the trial anymore how do i get the trail off my computer so i can play the regulr

lol out of characters on the last one but what im trying to say is the trial that i got is affecting my regualar burning crusade and when i try to enter the authentication key it says my account is already upgraded because of the free trial. So i cant install the Burning crusade non-trial and if it says that my account has been upgraded then why cant i make a dranei or a bloodelf If u can help me and u read this all the way through then THANKYOU THANKYOU

You need to buy regular wow. Than BC afterwards. 2 games

You need to make a new account and upgrade that using the key you got with your Buring Crusade, you cant use two Burning Crusade Keys with one account, even though 1 key you entered was a trial