Did you try the smsg command to turn on tracing? I did this and got a trace file:
Ready;
smsg ftpserve trace on file
Ready;
15:08:48 FTPSERVE: Tracing to file has been enabled
--Do an FTP activity
smsg ftpserve trace off
Ready;
15:10:23 FTPSERVE: Tracing has been disabled
link ftpserve 191 1191 rr
acc 1191 c
filel * * c
Filename Filetype Fm Format Lrecl Records Blocks Date Time
FILE DEBUGTRA C1 V 137 111 2 12/20/10 15:10:23
