Cannot access my website, but it can be accessed by other people

I cannot access my website, my broadband connection in Spain is provided by Telefonica. I can access any other website (such as this one) other people in the USA or Australia can access it (I am in Spain) I have other websites, all  hosted by Powweb in the USA and they are accessable to me except the one, which is I have done a tracert on my other websites and they all go through to my hosting account, but the one for stops at Telefonica and then gives the message 'request timed out'. I seem to think that the problem lies with Telefonica, in that the path to my hosting account is blocked in some way, nobody seems to be able to find me a solution, Powweb say the problem is not with them and Telefonica are of very little help. Where do you think the problem lies.
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Julian MatzTechnical SupportCommented:

Although I too can access your site (from Ireland), I think there might be a problem with your DNS.

Your nameserver records are:

But the NS records at your nameservers are:

Try changing them to ns1 and ns2. It may or may not be the problem, but should be fixed anyway. Wait a couple hours, try again and let us know if the problem still persists...

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mikelettAuthor Commented:
Have managed to change my DNS to: and

have waited overnight but the problem is still there, I still cannot access
Any other suggestions?
mikelettAuthor Commented:
Have done checks with friends all over the world and with friends in Spain, all are able to access my website, the only people who cannot access it are connected by Telefonica of Spain. My question now is:- Could Telefonica block access to a particular website, either intentionally or unintentionally.
mikelettAuthor Commented:
Have now got back on-line. Have been nagging Telefonica Spain, my website hosts and my registrar, either one of them has found a problem and resolved it or the suggestion made by JULIANMATZ has worked, but has just taken time to permetate through the web, Thanks Julian for your help in pointing me in the right direction, I am a happy bunny once again!
Julian MatzTechnical SupportCommented:
That's great! Glad I could help.
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