Try

sz_ftp.OpenInternet("anonymous","somebody@email.com", "150.21.38.87", "21")

>>
>>What did you provide as Login and Password in this case?
>
>I tried
>
>
>sz_ftp.OpenInternet("","", "150.21.38.87", "21")
>
>and also
>
>sz_ftp.OpenInternet(,, "150.21.38.87", "21")
>
>with no succsess