Uploading File and get "HTTP Error."

Hey Guys,

I’m running WP 3.0.1 on a shared host using PHP5. I’m having issues uploading files that are a little larger via the media uploader in the admin section of WP.

Every time I try to upload a file thats over a few megabytes, it uploads, says its crunching, then gives me a big red “HTTP Error.” – nothing more.

This only happens on files that are a little larger – ie a 20mb .mp3 file. A 5mb file seems to work fine. Whats weird is in the past we’ve uploaded 40mb files without a problem.

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Here’s the steps I’ve taken so far to try and remedy the situation:

1. Double checked php.ini to ensure increase upload, post and memory size were high enough.
2. Updated .htaccess to include filter the security mod I found elsewhere.
3. Double checked all file permissions via ftp to ensure they were 755.
4. Called the host – “They don’t support 3rd party scripts” (I hate IPower)
5. Tried with different audio files of similar size.
6. Disabled all plugins

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Do you guys have any more ideas regarding what might be causing the vague “HTTP Error.” problem?

Thanks in advance.