Ftp settings.....?

Ftp works fine, but internal errors from software accessing ftp folders

Hi I have an ftp server setup, which i have users send me files for our cad dental design.
The software i use can read the folders on the network, and get the files fine, and delete them but it produces some errors in its own log file in relation
to it trying to write back to it.

Is there something i have to enable or change on the ftp settings to fix this…

see log file i have xxx out my address…

Exception detected in Inbox/Outbox. FTP Address: 203.86.xxx.xx. FTPConnection.FTPClient.ChangeDir (10959_20171122_1143(1)/OrderSource) call.EIdReplyRFCError.User not allow 9540:9372
2018-03-03 13.53.35 General Uploading og the Track and Trace was failed for the order 10959_20171122_1145 9540:9372
2018-03-03 13.53.35 Exception Exception detected in Inbox/Outbox. FTP Address: 203.86.xxx.xx. FTPConnection.FTPClient.ChangeDir (10959_20171122_1143/OrderSource) call.EIdReplyRFCError.User not allow 9540:9372
2018-03-03 13.53.35 General Uploading og the Track and Trace was failed for the order 10959_20171122_1145(1) 9540:9372
2018-03-03 13.53.35 Exception Exception detected in Inbox/Outbox. FTP Address: 203.86.xxx.xx FTPConnection.FTPClient.ChangeDir (10959_20171122_1145(1)/OrderSource) call.EIdReplyRFCError.User not allow 9540:9372
2018-03-03 13.53.35 General Uploading og the Track and Trace was failed for the order 10959_20171122_1147 9540:9372
2018-03-03 13.53.35 Exception Exception detected in Inbox/Outbox. FTP Address: 203.86.xxx.xx. FTPConnection.FTPClient.ChangeDir (10959_20171122_1145/OrderSource) call.EIdReplyRFCError.User not allow 9540:9372