Thanks a lot guys.
I installed the sun device detection tool and verified that the pci scsi adapter is not compatible.
I may need to read more about beginner's guide in solaris as I really dont know where to start.

-----Post Update-----

another follow up guys..

i removed the scsi card that i originally installed.. it turned out that the card is only compatible with sun os 32-bit and not 64-bit..
when i changed it to another scsi card, i was able to detect it thru cfgadm, it shows the scsi-bus, and it says connected but the status is unknown.
i use devfsadm to configure it but no luck as there is no /dev/rmt/0 directory or if i use " for foo in 0 1 2 3 4 5 6 and check the status using mt -f status,it says not found.
i tried to use /var/adm to verify the activity of scsi drive but says cannot execute.
sorry guys, im at lost now after sun is able to detect the scsi card and tape drive., i guess the question now is how to configure the scsi and tape drive so that i can start a backup..
thanks again..