ping from a Windows client desktop doesn't resolve

Hi,

I'm migrating and old MS-DNS to dnscache+tinydns.

I'm having a weird problem and I don't know where it could be coming from.

I have the Windows desktop with the MS-DNS IPs as DNS servers, I ping
any domain and it resolves it.

I have the Windows desktop with the dnscache IPs as DNS servers, I
ping and it does not resolve the domain, but if I run nslookup, it
does resolve.

After searching in google, I was able to fix it stopping the "DNS
Client" service in the Windows box, but I have over 200 clients on the
network and I don't want to go one by one stopping the service.

Did anybody run into this problem? why if the DNS server is running
MS-DNS works but if it is running dnscache doesn't work?

Thanks!

crlankis