The file(s) uploaded were too large to process.
 

I am trying to upload a MP3 file to a post and I am getting the: The file(s) uploaded were too large to process. message. I have confirmed that I have adjusted the settings correctly under the Attachments section of the ACP. Any insight?

What is the PHP Max Post Size and PHP Maximum Upload Size set at in the Admin CP?

Where would I find that? Under View PHP Information? Also, where would I adjust this?

It will be in the stats (Welcome to the vBulletin Admin Control Panel) at the top of the Admin CP.

Okay, cool.

PHP 5.2.17
PHP Max Post Size 8.00 MB
PHP Maximum Upload Size 64.00 MB
PHP Memory Limit 64.00 MB

This tells me that my post would fail as the .mp3 is 45 MB (right? Assuming the max size is only 8 MB?). How do I edit this information so that it will take?

That has to be done in the php.ini file, IIRC. You would need to have your host set that for you if you can't get to it. I have those both set to 64 MB and the memory limit set to 128 MB, as vb 4 takes a little more memory to work smoothly.