How can i remove index.php from my logo

I used SEF AND Use Apache mod_rewrite to YES
I changed htacces to .htacess
But still i dont know from where my logo is taking the url mywebsite/index.php ?
The index.php is cousing me problem with a chat
Plz help

thanx

only the logo has this problem.. all the others links are ok

found the solution
add this
# Redirect /index.php to / - will also clear /index.php/something to /something
RewriteCond %{THE_REQUEST} ^[A-Z]+ /index.php(/[^ ]*)? HTTP/
RewriteRule ^index.php(/(.*))?$ /$2 [R=301,L]
RewriteCond %{THE_REQUEST} ^[A-Z]+ /index.php(/[^ ]*)? HTTP/
RewriteRule ^index.php(/(.*))?$ /$2 [R=301,L]
in the htacces file