Why won't my email notifier work?

I have downloaded and installed Incredimail which has an animated notifier which tells me if any email has arrived into any of my three email accounts.

Trouble is it doesn't work. But it used to work before I had my hard drive clean-installed last week.

Now all I get are error notices.

The Incredimail people don't want to answer my questions, and nor do the people at Hotmail and Yahoo.