How to Use Two Domains with One Bind Server and One IP Address

Can I use two domains with one bind server and one IP address? I have two domains: domainold.com (successfully configured) and domainnew.com.

But every time I try to access domainnew.com, I am redirected to domainold.com instead.

Here is my named.conf.local:

zone "domainold.com" {
        type master;
        file "/etc/bind/db.domainold.com";
        allow-transfer { xxx.xxx.xxx.xxx; };
        also-notify { xxx.xxx.xxx.xxx; };
};

zone "domainnew.com" {
        type master;
        file "/etc/bind/db.domainnew.com";
        allow-update { none; };
};

Here is my domainnew.com file:

$TTL	604800
@	IN	SOA	ns1.domainold.com. admin.domainnew.com. (
			      2		; Serial
			 604800		; Refresh
			  86400		; Retry
			2419200		; Expire
			 604800 )	; Negative Cache TTL
;
@	IN	NS	ns1.domainold.com.
@	IN	NS	ns2.domainold.com.

@	IN	A	103.121.122.180
;ns1	IN	A	103.121.122.180
;ns2	IN	A	103.121.122.180
;mx	IN	A	103.121.122.180
;mail	IN	A	103.121.122.180

www	IN	CNAME	domainnew.com.

And here is my domainold.com file:

$TTL	604800
@	IN	SOA	domainold.com. admin.domainold.com. (
			      2		; Serial
			 604800		; Refresh
			  86400		; Retry
			2419200		; Expire
			 604800 )	; Negative Cache TTL
;
@	IN	NS	ns1.domainold.com.
@	IN	NS	ns2.domainold.com.

@	IN	A	xxx.xxx.xxx.xxx
ns1	IN	A	xxx.xxx.xxx.xxx
ns2	IN	A	xxx.xxx.xxx.xxx
mx	IN	A	xxx.xxx.xxx.xxx
mail	IN	A	xxx.xxx.xxx.xxx

www	IN	CNAME	domainold.com.