2) Can the MGT interface ping 220.127.116.11 (my FTP server)? Yes
3) Does it make a difference if I include a username and password in the command line? No. Exact same result. Shouldn't be necessary anyway.
From what I've derived from online research, error 111 seems to indicate a version mismatch between the IMG and PKG files, but if that's the case, I'm clueless why I'm mismatched. They're both 6.4.0 and I downloaded them from the same page on Cisco's website.