guest book problem

[speedyjay]

hi new to all this have managed to make a site and published it but when i click on the guestbook button it takes me to my guestbook page and i get this message


Warning: filesize() [function.filesize]: stat failed for ./guestbookdb.php in /home/uleegoce/public_html/guestbook.php on line 199

also the links dont work back to the homepage even though the homepage is there

my domain name is http://www.bathandwesterncountiesbulldogclub.co.uk

thanks for any help it is greatly appreciated :)