BOM Explosion in CN52N

Dear Guru's,

I am running a report through CN52N with customized layout. After running the report, the BOM is not getting exploded, I am able to see only the first level of components but not able to see the components of the below level. I have selected the BOM selection levels from 1 to 99.

Can you please let me know what is missing to get my requriement correct.

Thanks in advance.

Regards

Kalyan