I am a new user to myibay but, it looks like there is no way to tell that the bidding snipe i just placed on myibay is active or not, The only thing I get is the colom of "Snipe" is pink color. When clicking "activate snipe" nothing happand.

If your snipe column is pink color, that means that your snipe is active.

You can also click "Snipe" button to go to another window. You should see a checkbox checked next to "Activate Snipe". That's another way of telling that your snipe is activated.

If that checkbox is not checked, you have to check it and click "Change" button to save your changes.

Sorry, but on the web-based screens I am unable to find the "Activate Snipe" button? or status that says that the Snipe is active.

Where is it, please?

TIA

It's located on the Snipe screen. Click "Snipe" button next to the item to see it.
Also, if you see your snipe amount in the "My Bid" column, that means your snipe is set.