[Serusers] help!

[fangzg at mail.ustc.edu.cn]

hi,
  i have install ser and serweb on redhat linux 9.0 .apache,php,mysql have
already installed.but i can't send im through serweb。recevie errors:500
command "t_uac_dlg" not avaliable.
why,please tell me .thanks a lot!

                                         zhiguo fang
                                         2003.9.21