yup i tink its worked so far. I do have a question though, why should i worry if it happens a lot like what could be the problem?
The only time I'd think this problem would happen is if you disconnect your cable, reconnect it to another device for a while (long enough for something to change DNS-wise) then reconnect it without rebooting or /release; /renew or /flushdns. Or, it coulda happened with a router/modem reboot while your computer was on.
Regardless, if it happens a lot, then I'd say there is something wrong either in your NIC, your ISP, or your router... but that's pure speculation.