cd command not working for FTPS implementation using pub.client.ftp:quote svc

Hi

Im using a FTPS connection with authentication type as SSL.
Im unable to change the directory from root “/” to a specified location
(say C:\CerebrusArviceFiles)
The FTPS server is a Cerebrus server hosted on Windows Server 2008 R2 platform and the FTPS client is the wM IS (version 8.2 SP2).

Returncode :502
Return Message : 502 Unrecognized or unsupported command

Is the same cd working when you do it from DOS command prompt to make sure working manually?

Also try PASSIVE mode if that works:

Referred in this article:
http://www.cerberusftp.com/phpBB3/viewtopic.php?t=6