Problem ftp 530 User admin denied by SACL

Hello everyone,

I have a problem with 4 iMacs, 3 with Mavericks and 1 with Lion, they are connected to a LAN, they must have configured a ftp server for a printer, but I have the same problem with all, the ftp looks running but when I try to login, (I do that from terminal and from the same iMac , "ftp localhost") , I get this error:

....

331 User XXXXXX accepted, provide password.
Password: 
530 User admin denied by SACL.
ftp: Login failed

....

The file userftp looks ok too... At the same LAN I have another iMac with Yosemite, but this works without problems..

Anyone can help me??

Thanks.

(Sorry for my english)