Upload large video files using moss

Im using share point 2007 over IIs 7.5. While trying to upload a video file to the SharePoint (size 160MB), Im getting 404. Moreover, I created my own UploudFile custom Fiel in order to save t开发者_C百科he video files into a streaming server (and avoid saving it into the sharepoint server), but i can't get into my code in debug mode - the 404 accures before it's get to my code.

I tried to change the MaxUploadSize of the web application to 200 MB in the Web application general settings.

Should I change something in the IIS settings? Is there a problem of time out or somethig?

thanks.

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