Hi Madhu
It's possible that ASMA is always active for AS2 Sender channel then. I don't have the Seeburger adapter in my current project, so I can't verify it.
For the message that you have previously posted via the AS2 Tool, can you check the DynamicConfiguration section of the message in SXMB_MONI and post the screenshot here. I would like to see what values are there.
If your partner is not ready to send you a message from their AS2 application, another option you can try out is to use Mendelson AS2 test tool.
Rgds
Eng Swee