Since he has posted in this particular section, we can assume he's using ioBanana. Though, this is a minimum information problem... we don't have any version number (ioFTPD, ioBanana or windrop) nor configuration overview (except the L flag).
I'm going to write a list of required information when asking for help otherwise we'll continue to lose time asking and filling the first page of each thread with those basic questions.
TeraNigmA: you're not using SSL but are you running ioFTPD and/or your sitebot as NT-services ?
How long is your Welcome message ? If it's really long, I suggest you make sure your sitebot won't see it. Iirc, you can do that exporting most of it to another file and including this one with specific permissions :
Code:
%[include(c:\path\to\filename)(!S)]
then anyone with the S flag shouldn't see it.