Warning Messages When Install ithemes Titanium on 2.9.2

Installed ithemes Titanium onto wordpress 2.9.2.
What does the warning messages below mean? I pressed the button to activate the theme. What should I do. Are files corrupt or what to do now. Thanks.
https://www.laughterbuffet.com

Warning: fopen(/home2/petchatn/public_html/laughterbuffet/wp-content/themes/Titanium/style.css) [function.fopen]: failed to open stream: No such file or directory in /home2/petchatn/public_html/laughterbuffet/wp-includes/functions.php on line 3598

Warning: fread(): supplied argument is not a valid stream resource in /home2/petchatn/public_html/laughterbuffet/wp-includes/functions.php on line 3601

Warning: fclose(): supplied argument is not a valid stream resource in /home2/petchatn/public_html/laughterbuffet/wp-includes/functions.php on line 3604