com port help needed

Hi
Was wondering is anyone using an isa Siig 4s expander with suse 7.1
it seems that i can kissattach line and it seems to be TX but cant
recv anything back  if anyone has added one of these cards to suse 7.1
and has it working maybe you can tell me if there is anything special in
getting this card to work on com port 3 and 4 which is ttyS2 and ttyS3
thanks for any info
Bob N1UAN
/ex