ns2.arcemus.com has no CNAME records.
Question and response
Question
dig ns2.arcemus.com. NS
Answer
The response has no answer records.
Authority
arcemus.com. 33391 SOA udns1.cscdns.net. hostmaster.cscdns.net. 2011022716 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0