failed: Directory not empty, proftpd

[shinigaimi]

I am getting this error I am having my IP Camera NVR upload to freenas via ftp port 21 below is the error I am receiving

Code:

Apr  3 20:17:44 freenas proftpd[21985]: 127.0.0.1 (XX.XX.XX.XX[XX.XX.XX.XX]) - USER FTPUSER: Login successful.
Apr  3 20:17:44 freenas proftpd[21985]: 127.0.0.1 (XX.XX.XX.XX[XX.XX.XX.XX]) - renaming '/mnt/Storage/FTP/FTPUSER/dstkCnG4PEl' to '/mnt/Storage/FTP/FTPUSER/XX.XX.XX.XX' failed: Directory not empty
Apr  3 20:17:44 freenas proftpd[21985]: 127.0.0.1 (XX.XX.XX.XX[XX.XX.XX.XX]) - renaming '/mnt/Storage/FTP/FTPUSER/XX.XX.XX.XX/dsthrWcTtr7' to '/mnt/Storage/FTP/FTPUSER/XX.XX.XX.XX/2014-03-22' failed: Directory not empty
Apr  3 20:17:44 freenas proftpd[21985]: 127.0.0.1 (XX.XX.XX.XX[XX.XX.XX.XX]) - renaming '/mnt/Storage/FTP/FTPUSER/XX.XX.XX.XX/2014-03-22/dstljgqPMB7' to '/mnt/Storage/FTP/FTPUSER/XX.XX.XX.XX/2014-03-22/003' failed: Directory not empty 

Thanks for any help !!!