Only "Apply Visa" button is activated but no email invitation for Subclass 187

[Guest nohanaod]

I submitted my EOI on July 26, 2012 and became eligible for the visa types Regional Sponsored Migration Scheme (Subclass 187) (Permanent) and Business (Long Stay) (Subclass 457). Shortly, I think it is around August 10-13, the "Apply Visa" button for the Subclass 187 has become active. However, I didn't receive any invitation letter to my personal email that I supplied during submission of my EOI either from an employer or a state.Just I am simply sitting and waiting for unknown for the past 2 weeks since the “Apply Visa” button has become active. I am confused of what to do. Should I start the visa application for the activated 187 category only for the “Apply Visa” button is activated or wait for invitation letter to my email? Thank you very much.