Dear Rahul,
seems that you created the BP with the general role:
Please go to the change mode and choose either SLLCPC (customer) or SLLCPS (supplier) and save again:
Now you should have a second entry in /SAPSLL/PNTBP with partner category 04 and 01 or 02. Also you should have one entry in BUT100 with partner role SLLCPC or SLLCPS.
Regards,
Pascal