Editing Post Brings Down Server

This is a problem with a mix between a plugin and WordPress.

I’m using a run-php plugin, with the <?phpand ?> being the start and end tags (rather than <phpcode> and </phpcode>).

I wrote a post with the code <?php echo "test"; ?>, and saved it as a draft. Now, whenever I attempt to edit that draft, my server goes down and I can’t get to it. This seems to be a major problem.