Multi level BOM not getting explode in CK11

Hi,

I am facing one problem in CK11

we have multi level BOM

Material BOM Componeent

XYZ ABC

DEF

Now this ABC and DEF again have there BOM but when I RUN CK11 for XYZ i can see the material ABC and DEF but there BOM is not gettign explode in CK11 what settign may be missing.

regards,

zafar