various errors

I am working to evaluate smarftp and wsftp for purchase. I like smart better but there is a consistent issue.
I was getting an error about "port command" so I changed to port mode and then got an error about "non existent file" and then found to change my transfer settings to "UNCHECK SHOW ALL FILES" and "RESOLVE LINKS"
What do I lose by not having the "show all files' and resolve links?
Are there any other settings to look at to optimize my ftp client side settings?

Then I got in and things seemed to work but now I get these errors.

Please help as I need to get this in the next day. I called sales and they told me I had to get help this way.
here is my log, basically I am getting 2 errors now of "error 502 command not implemented"
SmartFTP v1.5.990.19
Resolving host name "192.168.2.7"
Connecting to 192.168.2.7 Port: 21
Connected to 192.168.2.7.
220 Service ready for new user.
USER jake
331 User name okay, need password.
PASS (hidden)
230 User logged in, proceed.
SYST
215 UNIX Type: L8 Version: SnapOS.
FEAT
502 Command not implemented.
TYPE I
200 Command okay.
REST 0
502 Command not implemented.
PWD
257 "/" is your working directory.