Is the .htaccess file in question located in your admin dir. ?
You can test if your Admin .htaccess file is the problem by renaming it and seeing if you have access.
If yes then you will need to include access for your IP.
#.htaccess to prevent unauthorized directory browsing or access to .php files
IndexIgnore */*
<Files *.php>
Order Deny,Allow
Deny from all
Allow from xxx.xxx.xxx.xxx
</Files>