fresh install won't show default apache page

[ecovisiones]

I have a similar problem only 1 site is working: hierbitas.com. This is the first added in WHM and the dns are: ns1.hierbitas.com and ns2.hierbitas.com, the other sites not working or loading intermittently (f.i. ecovisiones.cl and eco-finanzas.com).
The dig command report:

dig http://www.hierbitas.com
; <<>> DiG 9.7.0-P1 <<>> http://www.hierbitas.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 55462
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;http://www.hierbitas.com]Plantas medicinales.		IN	A
;; Query time: 13 msec
;; SERVER: 200.74.121.12#53(200.74.121.12)
;; WHEN: Sat Feb 26 00:09:33 2011
;; MSG SIZE  rcvd: 35

I tried all options mentioned here but nothing is working.
I did a request to my VPS provider but they say that there is not problem.

[Infopro]

/http://www.intodns.com/eco-finanzas.com

That shows that there are some issues.