Can't login in Zoho CRM Outlook Plugin

Can't login in Zoho CRM Outlook Plugin

I'm using Outlook 2010 32 bit, and in the last 2 days i haven't been able to login in the outlook plugin with my Zoho CRM Credentials. I haven't changed my password and  was working before. Only recently changes in my system were 1 - installing a service pack for office 2010 and 2-installing windows 8.1 preview. 

Any help would be appreciated.