windows server 2003 - DNS not working on WS2003, but nslookup works fine

I have a virtual machine with Windows Server 2003 (SP2). The DNS resolution seems to be broken, but the nslookup command works fine. Well, I guess that means that the DNS resolution works fine, but I get this response when I ping any domain:

Ping request could not find host FQDN. Please check the name and try again.

That brings all kinds of problems. The email server cannot send messages because it doesn't get the IP addresses for the domain names, etc.

The DNS servers work fine.

Any suggestions?

Thanks in advance.

ipconfig /all result

Configuración IP de Windows

   Nombre del host . . . . . . . : S15350948
   Sufijo DNS principal  . . . . :
   Tipo de nodo. . . . . . . . . : de igual a igual
   Enrutamiento habilitado . . . : No
   Proxy WINS habilitado . . . . : No


Adaptador Ethernet venet0:

   Sufijo conexión específica DNS:
   Descripción . . . . . . . . . : Parallels Virtual Network Adapter
   Dirección física. . . . . . . : 00-FF-7E-1C-68-10
   DHCP habilitado . . . . . . . : No
   Dirección IP. . . . . . . . . : xx.xx.xx.xx
   Máscara de subred . . . . . . : 255.255.255.0
   Puerta de enlace predet.. . . : 192.168.109.113
   Servidores DNS. . . . . . . . : 208.67.222.222

                                   208.67.220.220
                                   127.0.0.1
                                   8.8.8.8
                                   8.8.4.4
                                   87.106.2.251
                                   195.20.224.234
                                   195.20.224.99

I tried OpenDNS and Google's Public DNS. I've already removed/reordered the DNS servers.

>ping google.com
Ping request could not find host google.com. Please check the name and try again

>nslookup google.com
Servidor:  dns2.schlund.de
Address:  195.20.224.99

Respuesta no autoritativa:
Nombre:  google.com

Addresses:  209.85.148.103, 209.85.148.147, 209.85.148.105, 209.85.148.106
          209.85.148.104, 209.85.148.99