Warning Messages When Installed Titanium Itheme-What Does It Mean?

Installed ithemes Titanium onto wordpress the 2.9.2 and got this message below before I activated it. What does this mean. Is this corrupted. What should I do? thanks.

http://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