Thread:Extension talk:ImageMap/Use ImageMap with Inline Linking that is ImageMap on images not uploaded to wiki (2)

The following code works but if I change the image name to a url then it doesn't work.

If I change image name to a url like

it says, Error: image is invalid or non-existent

I am using wiki on a stick and I have a directory where the image is stored. The URL works in browser window.

May be I am not using the right syntax. I have tried a bunch of syntax but unsuccessful. Please help in this regard. Thank you very much.