[Plugin: Wp-Insert] Adding php code inside the adblock box

I am using Adrotor plugin to rotate my adds. And this has two syntax.

<?php echo adrotate_group(9); ?>

And

[adrotate group=”9″]

When I use them in the Adcode Block Textbox. It is now showing the adds. What could be issue

This renders the source as
style=”float:left;margin: 5px;padding: 0px;”>TTT<?php echo adrotate_group(9); ?></div><div id=”in_post_ad_right_1″ s

http://ww.wp.xz.cn/extend/plugins/wp-insert/