[Plugin: AdRotate] Using it with W3 Total Cache?

W3 Total Cache’s FAQ on fragment caching gives these examples:

* Example 1:
<!– mfunc any PHP code –><!– /mfunc –>
* Example 2:
<!– mfunc –>any PHP code<!– /mfunc –>
* Example 3:
<!–MFUNC –>
echo rand();
<!–/mfunc –>
* Example 4:
<!– mclude path/to/file.php –><!– /mclude –>
* Example 5:
<!– mclude –>path/to/file.php<!– /mclude –>

However when I use one of the above examples with my php code from AdRotate it won’t work.

This is how I put my php code into the examples above:

Example 1:
<!– mfunc <?php echo adrotate_banner(‘2’); ?> –><!– /mfunc –>
Example 2:
<!– mfunc –><?php echo adrotate_banner(‘2’); ?><!– /mfunc –>

What am I doing wrong?