Fatal error: Call to undefined function: smarty_core_write_file() in /home/ualuu/public_html/serendipity/bundled-libs/Smarty/libs/internals/core.write_compiled_resource.php on line 29

I update serendipity 0.8 beta 1 to serendipity 0.8 and now the blog doesn't works, I only see that error (the admin ...

I install without problem the serendepity, and I used it around 2 months. But today, my host provider activate the suEXEC module for PHP, and the blog have now a Internal Server Error...
How i can use the blog now?

The guest is me.