pb to install qnx with the cdrom iso image

I understand the problem but i can’t resolve it
when i try to boot with the floppy disk made with the install program from
the iso cdrom (or when i boot with this cd) the system boot, detect my ide
controler, i can create the partition (all my disk space). The file system
mounted and the copy of the file start. But the second one, qnxbase.ifs not
found ! The the access way is bad (/cd//boot/fs/qnxbase.ifs instead of
/cd/boot/fs/qnxbase.ifs)

Do you know how to resolve my problem ?

Thanks for your help.
(my config if is it important : cirix200, 32 mo, hdd 850 mo ide lba master
on fisrt channel, and cdrom master on second channel)

email : zoum.info@wanadoo.fr