how to login isabelmacros new dns server?

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i have got message form isabel macro that they changeing to strong server but yesterday i have got message, the domail has redirected to another serverfor that you have to update your DNS setting. Wer recommanded the following, 1)delete all chache files, 2)change DNS to open DNS info: http://www.opendns.com/start I dont udersatnd what to do? can anyoane tell me what exaclty to to login once again to Isabelmacro, Regrads Rahul