lem45 on "edit htaccess"

hi,

I would like to edit the .htaccess file. I would like to increase the

php_value post_max_size 100M
php_value upload_max_filesize 10M

But every time I edit the htaccess i get an server error 500 and my site doesnt work.

Can I edit the htaccess (containing all that rewwrite stuff) at all?

If so, where?

Thanks!
lemmy