Apache, PHP, htm

I am running Apache 1.3 with PHP 4 on a Solaris. PHP works fine with .php extensions, but will not parse from .htm or .html extensions. I have tried the standard response, i.e. setting AddType application/x-httpd-php .htm .html This continues to process html code, but leaves out all php code for all file extensions. (It shows up in the source as text). I next tried: AddType application/x-httpd-php .php .htm .html With this, php works fine from .php files, still doesn't read from .htm files, and causes all .html files to give a "download file" error. I have searched your newsgroup extensively and have not found anyone who has had difficulty with the above fix. I am at a complete loss on what to try next. Any help would be appreciated. -DanL