China Mobile "edge" data problems

Hi,

I'm in Shanghai right now. I just bought an M-Zone sim card from China Mobile for my Verizon Blackberry 9650 (unlocked). Voice works fine. I added a 10 yuan/70mb gprs plan.

My phone's apn is set to cmnet with no username or password. However, it says I am "roaming" on data. It shows a lowercase "edge" sign in the top right corner.

Opera mini will not work.

What can I do? I looked through threads and I know it should work. It actually worked for a split second yesterday. Now, its back to not working.

Thanks.