FTP Statistics not working

[Martini]

OK, I did it and got quite a long report. There's nothing special about it except for one fragment:

Code:

[DEBUG] push_el() sub_name: gen_log_file(), msg: Starting for logfile /var/log//proftpd/ftp_traff.log
[DEBUG] push_el() sub_name: gen_log_file(), msg: Taking the domain log positions from '/var/log/ispcp/logdb'...
[DEBUG] push_el() sub_name: gen_log_file, msg: Logfile contains no data, so skip it for now.

This double slash "//" is displayed only here and I guess that's why ftp stats aren't working,
but I have no idea how to fix it.

EDIT:
Alright, I've manged to fix the double slash (by removing it from the beginning of the FTP_TRAFF_LOG path), but after running the stats gatherer FTP stats are still dead,
and in the same section of debug report I get this:

Code:

[DEBUG] push_el() sub_name: gen_log_file(), msg: Starting for logfile /var/log/proftpd/ftp_traff.log
[DEBUG] push_el() sub_name: gen_log_file(), msg: Taking the domain log positions from '/var/log/ispcp/logdb'...
[DEBUG] push_el() sub_name: gen_log_file, msg: Logfile contains no data, so skip it for now.

I don't know what to do with it next...