dstats2 problem

I’ve followed instructions twice now and still get the same error. the plugin was activated and it occurs after the wp-settings.php file is uploaded to teh server.
the error: Hey guys, I followed directions on the Readme and the problem I’m currently left w/ is this error:
Fatal error: Call to undefined function: backslashit() in /home/faisal/public_html/fpress/wp-includes/functions.php on line 34
any ideas? The plugin IS activated.
site – http://lame.phatchicks.com