Confused!!!

Just wondering if anyone could help me... When I try commenting on my own blog posts or posts on other blogs using my Google Account, it tells me I need to sign in, which I do, it then leads me back to the comment page where there is a preview of my comment (yet my name is 'Anonymous') and when I try posting that comment it takes me back to the Google Account page! It's very frustrating!

This is why I haven't replied to any comments you lovely people have left me and why I haven't commented on your blogs yet! Believe me, I've tried! Anyway, I'm sure there's a very simple solution to this and I'm just being stupid but I'm quickly losing my patience.. Grrrr!!

Any help will be huuuuuugely gratefully received!!!

Thankyou xx