Step 2 of disassembly

i have a problem in step 2 in the manual for disassembly of the iPhone 3gs iPhone 3GS Front Panel Assembly Replacement.

The problem is that I only have the glass following me up with my suction cup, not the display itself. I don't want to pry in there, but what else is there to do? The glass is only loose in the home button end and I'm not sure I can continue to take the whole glass out.

The glass have been repaired once, so I realize this must be affecting how things are with my phone.

When the glass is loose on its own like this, what can I do to get the display assembly to come up so I can exchange my battery?