INET Connect problem !! Help

[AS400]

The below connection works great for regular ftp.

With Inet1
.Protocol = icFTP
.URL = "ftp://63.32.82.31"
.UserName = "user1"
.Password = "pass1"
End With

I am trying to connect to Mainframe with the same protocol. I am having some problems.

IN DOS prompt i need to type
c:>ftp
ftp>open 68.32.82.31 5000
ftp>user
this work.

Please let me know how to use OPEN statement using the INET control..

Thanks for your great help.