X and Fluxbox :: No Screen Found

Hello again
dunno if this is the right place to post, btw this is mainly something x-related...

and yes, there is another post about "sisusb" (a.k.a. usb-to-vga device) and i'm the same poster, but
1) this is a slight different issue and
2) i need an help
(how strange... )

i need to connect a second monitor (third, fourth...) into my dsl-n system using sisusb

sisusb, aka usb-to-vga device, is an usb device with a vga connector, you plug the monitor into vga connector, and device into usb port "et voila" monitor plugged to vga...

i know this device and this monitor are working 'cause they work if plugged into a fedora system

i had to compile (using knoppix 4 dvd like someone adviced me) sisusb.ko module
then copied into dsl-n system.
then i did load module (with "insmod /home/dsl/sisusbvga/sisusb.ko". and added into /opt/bootlocal.sh so i know dsl load it every start)
then copied sisusb_drv.o into /usr/X11R6/.../drivers/ directory
then i plugged sisusb into system
and apparently sisusb work: monitor turn on (but show a blank screen with red border: i need to configure it)

i tried to configure it (cut&paste from fedora's configuration) but does not work: system show only one screen

working both on my dsl machine (where sisusb does not work) and on my fedora machine (where sisusb work) i tried to force using "only the sisusb-ed screen"
while fedora-machine start x normally (just, i see it on sisusbed monitor), dsl-n-machine does not work:

Code Sample

# cat /var/log/XFree86.0.log | grep EE (EE) No devices detected.

so i suppose there is something else i need to do to force dsl-n machine "see" the sisusb??

someone adviced me "modprobe sisusbvga" but report

Code Sample

# modprobe sisusbvga FATAL: Module sisusbvga not found.

as i previously stated, i already gave "insmod" command (and put it into bootlocal.sh script so i'm sure will be executed at startup).

same result using both XFree86 and Xorg72

so, again, what can i do to force system to "see" the sisusb???

Edit
i add my dmesg:

Code Sample

sisusb: USB2VGA dongle found at address 3 sisusbvga[133]: Allocated 8 output buffers sisusbvga[133]: 8MB 1 ch/1 r SDR SDRAM, bus width 32 usbcore: registered new driver sisusb sisusb: Driver version 0.0.7 sisusb: Copyright (C) 2005 Thomas Winischhofer

lsusb

Code Sample

Bus 004 Device 002: ID 15ca:00c3 Bus 004 Device 001: ID 0000:0000 Bus 003 Device 001: ID 0000:0000 Bus 002 Device 001: ID 0000:0000 Bus 001 Device 003: ID 0711:0900 Magic Control Technology Corp. Bus 001 Device 001: ID 0000:0000

i post lsusb -v and XF86Config-4 in external link 'cause are too long
http://www.webalice.it/dottordivago/appo/xf86 for XF86Config-4
http://www.webalice.it/dottordivago/appo/lsusb for lsusb -v (i kept only info on sisusb...)

auto-reply, just to let u know
i found a way with
# mknod /dev/sisusbvga0 c 180 133
(i added this at /opt/bootlocal.sh too)ù
and now it work: sisusb work, and screen is found

Edit
another problem: now got some problem finding FIRST videocard, i mean the one standard agp integrated into mb
same problem, but with non-sisusbed monitor