I've no permisions to get into Management Console Exchange 2010

Hello, I’ve an Exchange2010on a2008Serverwho is alsotheADdomain. TodayI´ve createda type contact account on Exchange and all ok.But suddenly, I return to theExchange consoleto performanother operationand I have nopermissionsat all.Istood at"Organization Configuration" for example, and justshows "Hub Transport", right I get"Nopermisionsenoughto seethis information."Nor do I seethedropdown"Server Settings",and then I see"Recipient Configuration" and appeara fewmailboxes anddatabut I don’t havemoreoptions available tointeract. What happened?. Apparently everything works fine, you can send andreceive mailsand everything works, but I can’t do anything with Exchange. Irebootedthe server butit still isthe same. TheAdministratoraccountis, as always, has not done anything.HowI canfix thisplease?. I need help.

Thank you very much.