Sorry you will never be able to attach a 60-minute voice file. No email system can handle such big attachments.
Instead, you really should try DriveHQ FTP service or Online Storage & Sharing service. For more info, please visit:
http://www.drivehq.com/ftp/ DriveHQ FileManager 4.0 client is strongly recommended for files of this size. You can click on the flash demo for step-by-step help.