hi every body

i have a pb with backtrack 4
my system can't detect any networking interface only eth0 loop interface
i have an intel Pro 100 LAn card,
when i tape "modprobe e100" my computer display an error message ' module e100 not found'
when i tape : find /lib/modules/'uname-r' -name e100\*
the systeme found 2 modules :
and e1000*
what can i do ?