Which DNS settings? That domain has ev1servers.net nameservers, so the A record needs to be there (via Members area/DNS configuration), not in the DNS settings in Plesk. As of right now, it's not in the authoritative nameserver:
CODE
$ dig @ns1.ev1servers.net test.linson.us
; <<>> DiG 9.2.3 <<>> @ns1.ev1servers.net test.linson.us
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 60170
;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;test.linson.us. IN A
;; AUTHORITY SECTION:
linson.us. 7200 IN SOA ns1.ev1servers.net. admin.ev1.net. 1099915792 3600 1800 604800 7200
;; Query time: 22 msec
;; SERVER: 207.218.245.135#53(ns1.ev1servers.net)
;; WHEN: Sat May 21 17:24:03 2005
;; MSG SIZE rcvd: 96