twitter acounts

I'm not able to open twitter at all and don't know why. This is the error I get: Server not found Firefox can’t find the server at www.twitter.com. Check the address for typing errors such as ww.example.com instead of www.example.com If you are unable to load any pages, check your...

When I create multiple twitter accounts there comes a limit, every time I cross it, Twitter removes half to 3/4 accounts of mine. Sometimes, they do before the limit even though I use different Proxies, and take break of hours after creating some accounts. Does anyone gets the same problem? If...