Apex domains cannot have CNAME records.
Question and response
Question
dig server1.nixser.com.my. NS
Answer
server1.nixser.com.my. 5 NS ns1.nixser.com.my.
server1.nixser.com.my. 5 NS ns2.nixser.com.my.
Authority
The response has no authority records.
Additional
ns1.nixser.com.my. 5 A 66.55.88.134
ns2.nixser.com.my. 5 A 66.55.91.0
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0