About the PiBrokerSDK and ProtectMode in Adobe Reader 10 & 11

Hi,

I have worte a plugin for Adobe Acrobat and Adobe Reader(reader-enabled).  My plugin worked fine on Acrobat 9\10\11 and Reader 9 but not on Reader 10\11.

Then I made a broker with the PiBrokerSDK provided by Acrobat SDK11. Now it works succeessfully on Reader11 ,but not on Reader10.

And I found that SandboxHFT was NULL by calling "ASExtensionMgrGetHFT(ASAtomFromString("SandboxHFT"), SandboxHFT_LATEST_VERSION)" in Reader10 when I debuged my project of my plugin.This resulted in broker process executed fail.

So I have some issues as follow:

1. Is the SandboxHFT available to Reader10? If not , how can I do the operation(such as register, file system...) in my plugin with ProtectMode On?
2. Why I can't turn off ProtectMode in Reader10? I can't find the checkbox to turn off ProtectMode in Security(Enhance). But I can find it in Reader11 at the same Location of Security(Enhance).
3. Can I get some other solutions to work on Reader10 without PiBrokerSDK?

Thanks and Regards,

lin zhihao.