Hi Madhu
From the DynamicConfiguration screenshots, it seems that the AS2 filename is not populated when it's transmitted into your PI AS2 adapter. Even if you change your configuration to the AttribMapper module, it will not work. Setting of the filename is dependent on the AS2 sender application - PI can only extract it out if it's available.
I think both the test tools might not support sending the filename over AS2.
I would suggest that you request your partner to send the file over AS2.
Rgds
Eng Swee