PRS t1 cannot get access to recovery mode after re-partiotion
I've followed instruction on MobiRead wiki under recovery mode. Everything runs well, I also made a dump of original disk and newly re-partitioned one. Seems everything have no problem at first, successfully rooted and install everything without any hurdle(I've done this since couple months ago), and now it keep failling shutting down so I just decide to make a full recovery. But I found myself failed get into recovery mode(press Home+Menu button), but I could still get into android system without problem. Under this circumstance I also afraid of using a sd-card recovery or factory recovery will make my machine cannot ever boot up again.
What can I do?
P.S.:When press Home+Menu button on start up, the bar went complete and then got back to empty, and it will not boot up into recovery mode or a normal mode unless I press reset button to get it boot into normal mode.
P.S.S:When shutting down, it just stays at the narrow window all the time.
Any help will be precious. Thx in advance for all.