I don't know if someone can help me...

www.theeducationstation.com.au

the catagory "baby" was working fine...and I'm sure I didn't do anything to it! now the error message says
Warning: Cannot modify header information - headers already sent by (output started at /home/accelera/public_html/theeducationstation/includes/languages/english/index.php:117) in /home/accelera/public_html/theeducationstation/includes/functions/functions_general.php on line 44

What to do?