Vintage Simmons Drums (UK) Users Group

i don't know much about simmons yet but i have an sds-8 pad and a sds-1000 
module.  the combination seems to work fine if i plug the pad into any of the tom 
ports  but if i plug it into the snare it barely works and if i plug it into the bass it 
doesn't work at all.  can anyone tell me if a specific pad is needed to make the snare 
and bass work or is something not working properly?  please help if you can.

thank you!