Can´t connect after disconnect

Hi, hope you can help me. Ive compilled, installed and configured everything like in trinity core guides, 3.3.5 server works perfect but, 7.3.5 has a problem. With a “virgin” client with no data i can log into the server perfectly, but if disconnect from the server , close wow.exe , open it again and try to connect again its impossible (blz51900002). only can login again if restart the auth server each time i want to log in. is like authserver dont recognises the player disconection. what can be the problem?