You just made this change today and your isp's cache has not cleared. The server is set up correctly. You just need to sit back and wait a few hours until your isp clears it cache.
PING monstertruckshop.net (213.215.223.192) 56(84) bytes of data.
64 bytes from 213.215.223.192: icmp_seq=0 ttl=53 time=161 ms
64 bytes from 213.215.223.192: icmp_seq=1 ttl=53 time=179 ms
64 bytes from 213.215.223.192: icmp_seq=2 ttl=53 time=143 ms
64 bytes from 213.215.223.192: icmp_seq=3 ttl=53 time=136 ms
64 bytes from 213.215.223.192: icmp_seq=4 ttl=53 time=171 ms
PING
www.monstertruckshop.net (213.215.223.192) 56(84) bytes of data.
64 bytes from 213.215.223.192: icmp_seq=0 ttl=53 time=134 ms
64 bytes from 213.215.223.192: icmp_seq=1 ttl=53 time=147 ms
64 bytes from 213.215.223.192: icmp_seq=2 ttl=53 time=143 ms
64 bytes from 213.215.223.192: icmp_seq=3 ttl=53 time=183 ms
64 bytes from 213.215.223.192: icmp_seq=4 ttl=53 time=134 ms
; <<>> DiG 9.2.5 <<>> @ns3.feniva.it. monstertruckshop.net
; (1 server found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 32675
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2
;; QUESTION SECTION:
;monstertruckshop.net. IN A
;; ANSWER SECTION:
monstertruckshop.net. 14400 IN A 213.215.223.192
;; AUTHORITY SECTION:
monstertruckshop.net. 14400 IN NS ns4.feniva.it.
monstertruckshop.net. 14400 IN NS ns3.feniva.it.
;; ADDITIONAL SECTION:
ns3.feniva.it. 14400 IN A 213.215.223.191
ns4.feniva.it. 14400 IN A 213.215.223.193
;; Query time: 156 msec
;; SERVER: 213.215.223.191#53(213.215.223.191)
;; WHEN: Mon Jun 4 15:51:13 2007
;; MSG SIZE rcvd: 131
; <<>> DiG 9.2.5 <<>> @ns3.feniva.it.
www.monstertruckshop.net
; (1 server found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 7284
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2
;; QUESTION SECTION:
;
www.monstertruckshop.net. IN A
;; ANSWER SECTION:
www.monstertruckshop.net. 14400 IN A 213.215.223.192
;; AUTHORITY SECTION:
monstertruckshop.net. 14400 IN NS ns3.feniva.it.
monstertruckshop.net. 14400 IN NS ns4.feniva.it.
;; ADDITIONAL SECTION:
ns3.feniva.it. 14400 IN A 213.215.223.191
ns4.feniva.it. 14400 IN A 213.215.223.193
;; Query time: 183 msec
;; SERVER: 213.215.223.191#53(213.215.223.191)
;; WHEN: Mon Jun 4 15:50:37 2007
;; MSG SIZE rcvd: 135