"Cannot Connect to the iTunes Store" in-app purchases

For the past week I have been trying to fix this if any one can help with this error please help.

First off I have the kit completed integrated, it works in the SandBox mode, and I can buy any of the in-app purchases with my test account. This is now the last thing before its approved by apple and its now delaying the launch of our app.

Here is the error report from apple
We found that your app exhibited one or more bugs, when reviewed on iPad running iOS 6.1.3, on both Wi-Fi and cellular networks, which is not in compliance with the App Store Review Guidelines. When we purchased any IAP items, the app displayed an error alert. Please refer to the attached screenshot for more information.

Here is the screen shot


At this point I don’t know what to do anymore I have been trying to get this store kit to work for the past month. I have emailed the prime 31 staff and I get ignored. My question before did not get an answer on there support site at all, got completely ignored, so I posted it here in the unity forms where some other developer helped me out. So if any one out there can lend a hand again and please help me. this is the vary last thing left. its now driving me crazy.

Do you call requestProductData() in your code?

We met the same IAP problem yesterday unitl now. It is all fine to test in SandBox mode before yesterday.

I think it is SandBox server problem, there is someone reported the same issue:
https://discussions.apple.com/message/22617726#22617726