This isn't really a question as it stands, it reads like a command! Are you asking whether you should plant them in September?

GOY member Meanie has experience with these - maybe he can answer you.

I'm assuming that it's come from T&M?
If so, mine came damp, so yes would be my advice, but not outdoors! They're described as hardy, but do a little research and you'll find that they will take temps of minus 5deg c for a short period only, and the potential combination of a cold damp winter would certainly finish them off.
If this was not you that asked about these earlier, cut and paste this link to your browser.........

http://www.growsonyou.com/question/show/32745

This is a link to my photo with a little more info on my potting medium, humididty and positioning........

http://www.growsonyou.com/photo/slideshow/177732-white-egret-orchid/member/meanie

If i were planting now I'd encourage them to shoot and them try to keep them as cool as possible indoors. I'm sorry that I can't help more.
Plan B would be to wait until spring only if you can be sure of drying the corms out fully without any risk of mould, but inspect them carefully before you opt for that plan - if there is any sign of a shoot,no matter how small, then I think that it's best to plant them now.