Seems ok to me now that you've fixed your nameservers:
Pinging ftp.ericchow.me [67.213.73.27] with 32 bytes of data:
Reply from 67.213.73.27: bytes=32 time=99ms TTL=48
Reply from 67.213.73.27: bytes=32 time=82ms TTL=48
Reply from 67.213.73.27: bytes=32 time=91ms TTL=48
Reply from 67.213.73.27: bytes=32 time=99ms TTL=48
Ping statistics for 67.213.73.27:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 82ms, Maximum = 99ms, Average = 92ms
ftp> open
To ftp.ericchow.me
Connected to ftp.ericchow.me.
220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
220-You are user number 1 of 50 allowed.
220-Local time is now 13:18. Server port: 21.
220-This is a private system - No anonymous login
220 You will be disconnected after 15 minutes of inactivity.
User (ftp.ericchow.me
none)):