Most USB devices do not work well on a hub. For port expansion, you are better off with a PCI USB adapter card. I think that you're overtaxing the USB bus. Look here:

http://www.usbman.com/Guides/USB1.1HubsT&A.htm

Remove the hub and put the mouse and cradle on the PC USB ports. If the problem is resolved, you need a USB adapter card.

Bill

: I have a Dell Precison 220 with an Intel82801aa USB Controller on the MB and a D-Link 7 Port (DSBH7) hub. Here is the output from the MSINFO32 applet:

: System Information report written at: 05/07/02 10:30:24 AM
: [IRQs]

: IRQ Number Device
: 9 Microsoft ACPI-Compliant System
: 16 Matrox Millennium G400 DualHead MAX - English
: 16 Adaptec AHA-2940U2/U2W PCI SCSI Controller
: 17 WINIC PCI 2P MIO
: 17 WINIC PCI 2P LPT Port (LPT2)
: 17 SoundMAX Integrated Digital Audio
: 19 OHCI Compliant IEEE 1394 Host Controller
: 19 Intel(r) 82801AA USB Universal Host Controller
: 18 3Com 3C920 Integrated Fast Ethernet Controller (3C905C-TX Compatible)
: 13 Numeric data processor
: 8 System CMOS/real time clock
: 6 Standard floppy disk controller
: 1 Microsoft Natural PS/2 Keyboard
: 12 Logitech-compatible Mouse PS/2
: 4 Communications Port (COM1)
: 3 Communications Port (COM2)
: 14 Primary IDE Channel
: 10 Intel(r) 82801AA SMBus Controller

: Many thanks for your time. I thought USB was supposed to be easy? I have two more devices I need to plug in as well. So much for Plug and Pray.