Direct php insert into jumi module issue

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Hi,
I'm using Joomla! 3.3.6 and php 5.5.22 and I found this component, happy to have the right solution for me.
Unfortunately, I'm noticing that the direct placement of php code inside a module jumi not working.

The code undergoes a sort of encoding, for example:

Code: Select all

<?php
$position = 'ads-sidebar-a';
.....
?>

becomes

Code: Select all

?php
$position = 'ads-sidebar-a';
....
?>'

Obviously I have all permits to operate on the site.

Is there a solution, or something that can I change?

Thanks in advance.