[Serusers] Question on ACC module

Hi, I have encountered the following problem when using ACC module: In my ser.cfg, I used "loadmodule /modules/acc.so" to load the acc module, I then included: modparam("acc", "log_flag", 1) modparam("acc", "log_level", 1) ... route[0] { ... setflat(1); ... } The module seems to be loaded all right and I can see relevant logs in syslog but not in MySQL database. First Problem: When I tried to add the following line in ser.cfg: modparam("acc", "db_url", "sql://ser:pass@localhost/ser") ser will not start and it complains that parameter "db_url" not found in module <acc>. Second problem: When I tried to log missed calls into db using: acc_db_request("404 not found", "missed_calls"); ser will not start and it complains "unknown command..." even though the ACC module is loaded. Can anyone provide some help on these two questions? Thanks, Haipeng