Gautam Vasudev - 8 years ago
For the Visualforce page that you created, did you copy the code from the example here?
If so, be sure to add it to a case layout only. If you add it to the layout of another entity, you will need to change the standard controller on the Visualforce page to that entity.
Can you also check that the layout is used by your profile? We want to make sure that the case detail page you look at in the Service Cloud Console does use the layout we just modified.
Finally, going directly to Visualforce page should show just a blank page. That's good, since we don't display anything on the page.