Thumbs up aosp kitkat4.4 nexus 7(deb) not boot

hi all:
i download aosp kitkat4.4 source codes from google website. i compiled the code. i got the ROM.but when i flash the ROM to my device nexus 7(deb). it cannot boot.

from the log. i found that following error log. the sentence "couldn't find an OpenGL ES implementation" maybe cause the fatal question.

any advices is welcomed !
thank
brian

02-10 08:37:07.375: E/QCOMKeyMaster(17633): failed to load qseecom library
02-10 08:37:07.375: E/keystore(17633): could not open keymaster device in keystore (Operation not permitted)
02-10 08:37:07.375: E/keystore(17633): keystore keymaster could not be initialized; exiting
02-10 08:37:07.405: A/libEGL(17630): couldn't find an OpenGL ES implementation
02-10 08:37:07.405: A/libc(17630): Fatal signal 6 (SIGABRT) at 0x000044de (code=-6), thread 17630 (surfaceflinger)
02-10 08:37:07.575: E/msm8960_platform(17632): platform_init: DLOPEN failed for libacdbloader.so
02-10 08:37:07.575: E/msm8960_platform(17632): platform_init: DLOPEN failed for libcsd-client.so
02-10 08:37:07.575: E/MonoPipe(17632): Failed to fetch local time frequency when constructing a MonoPipe (res = -32). getNextWriteTimestamp calls will be non-functional