[Serusers] NOTIFY Packet loss with bit message

Hi All, I am experiencing a problem in receiving the NOTIFY messages on my client. If the message size is less then 1 KB then it is getting delivered but not more then that. For that I changed my max_len settings in ser.cfg as given below to 15000. if (msg:len >= 15000) { sl_send_reply("513", "Message too big"); break; }; But now the messages are getting delivered when I am trying to send it over my local network but when I send it over GPRS, It keeps trying to send the message for some time and timeout after some time. I am using ser 0.9.6. Please let me know if you have any suggestion to solve this problem. Regards, Gourav