chronos.csr.net seems to be down, which is probably causing your time-out. You can check it yourself here.
Also tried pinging and connecting to NTP port 123, both resulted in timeouts:
C:\Users\ManeatingKoala>ping chronos.csr.net
Pinging chronos.csr.net [194.35.252.7] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 194.35.252.7:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
C:\Users\ManeatingKoala>telnet chronos.csr.net 123
Connecting To chronos.csr.net...Could not open connection to the host, on port 1
23: Connect failed