yes /dev/sdb2 a partition on the same usb flash drive as /dev/usb1

i installed slacko 5.7 to usb flash drive /dev/sdb1 using dd:
> dd if = slackopuppy57.iso of=/dev/sdb

/dev/sdb1 filesystem is iso9660
/dev/sdb2 filesystem is ext2

booting slacko 5.7 from usb flash on /dev/sdb1
/dev/sdb2/slackosave.2fs does not load
sfs loads fine,
but it just boots to default desktop with no saved settings.

boot option puppy debug=7 shows /dev/sdb2 mounting , but it's not finding slackosave.2fs

what else can i check ? i am at loss....