I was beginning to think it was a personal issue blogger had with me, as others seemed able to comment, while I couldn't, haha.
Thanks to Lesley (Home is where the heart is) all is now well and I am back! Hugs Lesley! :)
On her advise I've changed my comments to the pop up window type, which should help anyone who had the same issues as me.
I've also had to use the name/url option to comment with, when the blog doesn't have the pop up window enabled. I got that tip off a lady called Annemarie who commented on Daffycats blog.
So hopefully all should now be well.