Nostalrius Begins - Quality wow vanilla realm (1.12)

Hello
When i log in it says - this world of warcraft account has been temporarily suspended.
My main character is named - Whion ,PVP realm.
Can i know reason why i am banned?
I dont cheating, iam not a hacker i dont buy gold for real money.
Thanks for respond

Iam really sorry but i changed yesterday password 2x times and today a changed again and account now works...iam sorry for false ban alarm. still thank you nostalrius team for keeping this server alive. great honor to play here.

Today i was trying to log in but it says again that my account, has been temporarily Suspended. Can i please know what does it mean? Yesterday i was playing battleground and today i have got ban? Please i need to know reason why. Thanks for respond
Character : Whion
Realm : PvP