Admin crashes Apache

Hi.
When user logs to page, everything seems fine. he/she can read and post comments, create ... and so on.
When i want to log in as admin, Apache makes an illegal operation and details are here
"APACHE caused an invalid page fault in
module PHP4TS.DLL at 017f:10031c9a."

Some php bug?
And the rest of the page is here:
-- function b(title,content) {document.writeln("

" + title + "

" + content + "

");} function s(title,subleft,subright,body) {document.writeln("

" + title + "

" + subleft + "
" + subright + "

" + body + "

");} function c(subject,mod,author,date,body) {document.writeln("");if(body){document.writeln("");};document.writeln("

Pealkiri:
" + subject + "
" + mod + "
Autor:
" + author + "
Kuup