Be careful what you fill in for the PATH.
For example, I have a ftp share on my router. To access via command line I would:
$ftp 192.168.0.254
then enter name and pass
then change directory as below(my shared folder is called "share")
$cd share
then I can write a file
$put testfile
So on the cam I put
FTP Server 192.168.0.254
Username myusername
Password mypassword
Path share
Note that although "share" works for me, "/share" does not, "Share" does not(case sensitive), but "share/" does.
Maybe reset your camera, set it up wired first to test it out.