FTP problems?

[MOPAULY]

I'm running Plesk 7.5.4 on a Fedora core 2 box. When trying to connect with winscp3, I get the following error:

Connection has been unexpectedly closed. Server sent command exit status 1.

If I try to connect with filezilla, it just dies with this:

Trace: FtpControlSocket.cpp(923): OnConnect(10060) OpMode=1 OpState=-1 caller=0x003bd8cc
Trace: FtpControlSocket.cpp(1062): DoClose(0) OpMode=1 OpState=-1 caller=0x003bd8cc
Trace: FtpControlSocket.cpp(3783): ResetOperation(4100) OpMode=1 OpState=-1 caller=0x003bd8cc

If I use my admin account via my host, I can connect with winscp. The default ftp account for my domain and any of the webusers cannot.

What gives?

Not sure what to do from here, but I assume this is plesk related since the ftp is apparently tied into it.