erorr 619 Mikrotik Plz answer me

Hello .
plecse mikrotik support and anyone know about this problem answer me

i have mikrotik board useing it as AP and i have mikrotik os useing it as pppoe server too,
the problem is in erorr 619 when the i have more 30 clints online in pppoe list , all my clint's useing winxp,vista

this pic in pppoe log server when one clinet trying to connect

this a board in same time

....
i need support i'm waiting .....

what’s the problem no one answer me ?

upgrade to v3.30 and contact the support@mikrotik.com with the support output file.

Thank you Uldis i will do that …

sorry …
you mean (upgrade to v3.30) the server or the board ???
my board V 3.20
my server v 2.9.27
thank you i,m waiting your answer ..

upgrade server and look in the logs why server is disconnecting that client

Ok. anyways i will upgrade my server as soon …

Thank you . i will come back as soon to tell you what happen .