Can't upload long Sermons

Why can't I upload long sermons ? I'm at the backend of the site, and I was only able to upload one MP3. sermon that was 15mins. But the rest of the that are 40mins and longer cant upload ? It says something about it being corrupt? The mp3's are fine, i've tried uploading them to other sites and they are good.

Any suggestions ? Thanks !

It's a bit hard to tell from here why it doesn't work
However if short sermons work and longers don't, it's most likely due to the length of the sermon (this was obvious, right?).
Did you read the first step documentation: www.sermonspeaker.net/documentation/first-steps/installing.html ?
There it says something about possible problems and post_max_size and such things. Maybe check this first.
Maybe also check your server logfile if there is an error logged. If the script times out or runs out of memory, it will be written there.

Thanks so much ! I think that was it God bless !