Nostalrius Begins - Quality wow vanilla realm (1.12)

About a week ago I started experiencing very bad lag (both in Thunder Bluff and Silverpine) and would get DC'd every 5 minutes. Since then , about a week ago, I have been unable to connect to the server. It goes through the usual authenticating, success, etc. but then right as it should go to character select screen it says Disconnected. from server. This has been going on for a week and I did not change any files or anything that would of caused this. I did create a 2nd account to see if it was just an account issue but the same thing happens to that account, as well.

Account name Calbiyum 2nd account made to test is lerofl. Thank you