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who can help me for 21369?

I made one circuit board with sharc 21369,but it can't work, who can give me advices or help to check out what's wrong?i listed out the step i did:
1.i use C:\Program Files\Analog Devices\VisualDSP 5.0\213xx\Examples\ADSP-21369 EZ-KIT Lite\Talkthru Analog In-Out (ASM) this example code test in the ez-lite board, and rem the two initializing code ( //   call _initSDRAM;  )and (   // call _init1835viaSPI;),and it can work well in ez-lite
(working at 6:1,and without using ad/da and 12.288 osc,all these supplied through DAI port)
2.then i use the correct code testing in my board(my board is same with ez_lite,but without 12.288 osc and ad/da),but it didn't work.
3. i modified the initSRU.asm ,connect ad and da via sru,and it can work well.

the step 3 means all my hardware can work well,but the original code is receiving data from port0,then sendout with interrupt to port1,it can't work well(seems lost one array data,the music sounds every second lost part of music.)
who can tell me what should i do then to check out the problem?

and> my 21369 is LQFP-208, but not BGA