HTTP Error after uploading mp3 file

I know this is a common issue, but I have yet to find a sufficient resolution. I am trying to upload mp3 files to my website. They range from 50-60mb in size. I am able to uplaod a max filesize of 64 mb.

Screen shot of a portion of my php.info:

screen shot

I’ve tried to add this code to .htaccess per many post suggestions:

<IfModule mod_security.c>
<Files async-upload.php>
SecFilterEngine Off
SecFilterScanPOST Off
</Files>
</IfModule>

but to no avail. I use 1&1 as a host. Any ideas?