X-notifier not logging in/checking any e-mail accounts

X-notifier has not been able to automatically log in to my e-mail accounts. It is sometimes able to check the hotmail account but Gmail and Yahoo accounts are constantly greyed out and hover tootlip shows Gmail/Yahoo: not checked.

I've made sure that the login credentials are correct, as I've been able to open my accounts using context menu of X-notifier. The problem is just that X-notifier is no longer checking my e-mails.

Kindly look into this matter as soon as possible.

Thanks.

Saad.