Access machine -help??

so, i logged into f-- server as a--------, and was able to download the b----- file normally, as ascii and binary. the .z-- file however just refused to download. What am i doing wrong, is this meant to happen?

btw, don’t have user or anything yet, only login is the anon on ftp

if you can download B-----, then you should be able to download ----.z-- same way