Q: How Can I export a video with 5.1 wav in Final Cut Pro 7? with compressor? or Final Cut pro 7 itself can deal with it?

As topic

I want to export a video with 5.1 wav. My friend tell me I have to send the project for this.

1. After I sent a sequence to compressor, I finish the all setting and destination, but I can't press the final "submit" to export. why? any process i mIss?

2. Can Final cut Pro 7 itself export 5.1 video with separate track?

for question 1

Please help

thanks