this error suddenly started happening to my site and makes the entire site unaccessible.

Warning: Unexpected character in input: ''' (ASCII=39) state=1 in /home/liverpun/public_html/components/com_sef/cache/cache.php on line 159

Parse error: syntax error, unexpected '=' in /home/liverpun/public_html/components/com_sef/cache/cache.php on line 159


Any idea how to fix this? I"m using ARTIO JoomSEF v2.2.6 and Joomla 1.0.15 Stable

thanks