nanogui: Thread: Question about nxscribble and t1demo

I ported the tidemo and nxscribble with letter.cl and some other *.cl file
to the Assabet.
But I was facing the following problem to run them:
for t1demo:
it says that" the font/chinese/BG2UBG.KU file can not be found  create font
(HZXFONT,20)
for nxscribble even though I copy all the *.cl file over form the demo
directory to the ramdisk and ported them to the same directory as the
nxscribble.
the error still says that" cannot find letter.cl. 
Do you have idea about these two errors here?
Regards,
Xiaoyong