I'm using RH9 and I've got a problem with usb-storage module

Strangely about 10 days ago that module stopped being loaded with others at system start,how it did before.
Nevertheless even after I ran insmod usb-storage and opened and closed the mount point dir the module disappear again.

I thought it could be a change of mine in hotplug's conf but I reinstalled it without success

`dmesg|grep USB` tells me this about USB:

usb-ohci.c: USB OHCI at membase 0xe0829000, IRQ 11
usb.c: new USB bus registered, assigned bus number 1
hub.c: USB hub found
usb-ohci.c: USB OHCI at membase 0xe082b000, IRQ 9
usb.c: new USB bus registered, assigned bus number 2
hub.c: USB hub found
usb-ohci.c: USB OHCI at membase 0xe082d000, IRQ 5
usb.c: new USB bus registered, assigned bus number 3
hub.c: USB hub found
usb.c: new USB bus registered, assigned bus number 4
ehci-hcd 00:03.3: USB 2.0 enabled, EHCI 1.00, driver 2003-Jan-22
hub.c: USB hub found
hid-core.c: USB HID support drivers
hub.c: new USB device 00:03.1-1, assigned address 2
usb.c: USB device 2 (vend/prod 0x553/0x2) is not claimed by any active driver.
hub.c: new USB device 00:03.1-2, assigned address 3
usb.c: USB device 3 (vend/prod 0x9a6/0x8001) is not claimed by any active driver.
Initializing USB Mass Storage driver...
scsi1 : SCSI emulation for USB Mass Storage devices
Vendor: USB Model: Flash Disk Rev: 1.00
WARNING: USB Mass Storage data integrity not assured
USB Mass Storage device found at 3
USB Mass Storage support registered.
Initializing USB Mass Storage driver...
scsi1 : SCSI emulation for USB Mass Storage devices
Vendor: USB Model: Flash Disk Rev: 1.00
WARNING: USB Mass Storage data integrity not assured
USB Mass Storage device found at 3
USB Mass Storage support registered.

The main problem it's it holds disappearing during the session and I haven't got a clue of the Hell I did for it

Please help me