SSIS FTP Task problems

We are unable to retrieve a file from an FTP server using SSIS FTP Task. With the settings indicated below:

IsRemotePathvariable: False

RemotePath: /home/ftpu/test.csv

IsLocalPathVariable: False

LocalPath: working_directory (with Connection Manager entry setup for this)

Operation: Receive files

The following error is produced:

Performing a manual ftp works fine, hence suggesting a fault with the SSIS TFP Task. Has anyone else successfully used an FTP task, and if so, any ideas on what's going wrong?

Thanks

Neil