Why are the Google gadgets on my igoogle pages not displaying?

I was having the same kind of problem but I was using opera mini at that time and when I consulted from one of my friend, he said that I should use Google chrome or Mozilla Firefox. I switched over to Google Chrome and the problem was resolved. From my own experience, you are facing problem regarding opening of Google gadgets due to virus in your system or some error in your operating system so I would like to advice you that uninstall the current version of Mozilla Firefox and download recently launched version, which is Mozilla Firefox 6.0. Install it and see if iGoogle working or not. I have another solution, you can contact to Google guys about your problem with Google gadgets or you can simply leave an email on mail.google.com and you will get an appropriate resolution from the company.