Images normally aren't clickable, therefore I would suggest that you put the definition
android:clickable="true"
android:focusable="true"
in your layout.xml to the imageView.
If this is not helping, please edit+update your question and show us the part of your layout, where you define the image to have a look at it.
EDIT:
Tried it, and your code worked with me too - even with the upper case id name.
Can you please have a close look at your LogCat?
Mine sometimes doesn't really update, as long as I don't choose the device again.
To do so in Eclipse, go to the View "Devices" (or show it first via "Window") and click once on your device / virtual device.
If you still don't find your log entry in the LogCat-View, try to create a filter (via the green plus and giving it the String you defined with TAG
as "by Log Tag").
Have a look at android developers > Using DDMS at the section "Using LogCat"
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