error in inserting image!

Hi there,
Has anyone come across this. I installed WP and it seems to be fine untill I tried to post an image in a post.

Using the insert image option I input the link to the image, preview fine since I can see the image before I click save.

After I click SAVE, the image could not be shown up in the post instead it is a red mark “X”

Following the property of the mark, I found that, the link to the image that I input early was changed.
the link I input is http://wwww.abcdef.com/image.jpg
but after the save action it changed to
http://www.abcdef.com”http://wwww.abcdef.com/image.jpg”
and hence the image is misslinked. (it added an extra text which is my domain name to the link before it insert into the mySQL database)

I would appreciate if any one tell me how to solve the problem!