Thanks all!
The problem is that I'm booked on a Star Alliance award, so they won't let me do any changes prior to travelling. I go from YYZ to NRT to BKK to PEK, then PVG to NRT to YYZ.
Got business on all segments except that long first segment. ITN inventory still shows 12 seats available. I guess I'll just keep my fingers crossed. I lost my elite status since February, so just a basic member now.
BTW - are there restrictions on class of fare for Super Elites / Elites to upgrade on international segments?
Thanks again!