Default [Q] Sony Xperia Ion Bricked?

Hi all XDA member. I having a problem that my device can't boot properly after flashing custom rom (MIUI) . Have a question here..

1. Why i can't start the flash mode as seen on the video below? All driver and everything else have been installed in PC.">" type="application/x-shockwave-flash" width="425" height="350">

2. Already tried all method/tutorial/ tips that i found in xda thread but all failed. How can i solve this problem? Thanks