wp_register_script – & char is converted and breaks code

Hello there,

I’m having trouble when trying to load the script bellow with wp_register_script:

<script type='text/javascript' src='https://openx.mysite.com/spcjs.php?id=1&block=1'></script>

The & char is converted in & #038; and breaks the vars passed to generate script
(I’m putting a space between &-# so it’s rendered here)

I’ve tryied both & and & amp;

wp_register_script('openx', htmlspecialchars("https://openx.mysite.com/spcjs.php?id=1&block=1"), false, '1.0');

but I always get & #038;

<script type='text/javascript' src='https://openx.mysite.com/spcjs.php?id=1& #038;block=1'></script>

How can I load scripts with these extra vars?

One note, all my php files are utf-8 encoded

Thanks in advance!