Unable to import log files from MS ISA 2000 Server

I have downloaded the FirewallAnalyzer.
I installed the product in Win2K Server with SP4.
I have MS ISA 200 Server acting as firewall.
I have setup the ftp host to collect the log files generated by ISA.

In FirewallAnalyzer, I setup the remote host (in import log file) pointing to the ftp host to retrieve the log files.
I am able to login into the ftp host and able to select the directory which contains all the ISA log files.
I setup the time interval to 60 minutes.

The result is, FirewallAnalyzer did not retrieve any log files from the ftp host. I have waited for almost 2 days, but nothing happens.

I try to import one file directly, and it works. But this is not a solution for me, because the log files will growing everyday.

So, question: How do I import the all the log files, by using remote host feature? (which it says can import based on directory, not based on filename).

Please advice.

Thanks.

regards,
Linkie.