Hello, My outlook 2010 has stopped syncing email. New messages in the inbox are downloaded to Outlook but the Sent items, contact, agenda and so one aren't sync since 19th January. A other pc with Outlook 2007 is working fine.

Is there a way to solve this problem? So that my local changes (agenda, contacts) and sent mail aren't lost? Or should I contact my hosting provider to solve the problem?

Server: 7.1.4_GA_2555