For some reason these two modparams are always ignored. 

The table name used is always acc which is default name. 

How can I change the table name?

loadmodule "acc.so"

modparam("acc", "db_table_acc", "acc_$time(year)_$time(mon)") 

modparam("acc", "db_table_missed_calls", "acc_$time(year)_$time(mon)")

Accounting works as expected otherwise.

Appreciate any help. 

Thanks.