I want to know how allow printing when a pdf file with password protection??

Some of coding as below:

PDFControl1.SECURITY_UserPassword = 1111
PDFControl1.SECURITY_Permission = 1

I found that i can click "print" buttom on adobe reader 9, but the adobe reader version below 9.0 , then i can't print it.

ps. This case just for password protected pdf file.