Apex domains cannot have CNAME records.
Question and response
Question
dig hcgslenderize4u.net. NS
Answer
hcgslenderize4u.net. 5 NS ns-1454.awsdns-53.org.
hcgslenderize4u.net. 5 NS ns-1660.awsdns-15.co.uk.
hcgslenderize4u.net. 5 NS ns-1768.awsdns-29.co.uk.
hcgslenderize4u.net. 5 NS ns-800.awsdns-36.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0