USB Scanner not detected on VB Win-XP-pro

[vdotmatrix]

Hi I am on a Mac mini 2.7, i7, 16gb and in a VB with xp.

I have the scanner hooked up. I have added it to the list of filtered USB devices, installed the precision scan software and I ALWAYS get the following windowed text:

Failed to attach the USB device Hewlett Packard ScanJet 5300C/5370C [0001] to the virtual machine XP-PRO box.

USB device 'Hewlett Packard Hewlett Packard ScanJet 5300C/5370C' with UUID {25fc6e55-f5d1-4d41-83e3-c51d33e06a43} is busy with a previous request. Please try again later.

Result Code: NS_ERROR_INVALID_ARG (0x80070057)
Component: HostUSBDevice
Interface: IHostUSBDevice {173b4b44-d268-4334-a00d-b6521c9a740a}
Callee: IConsole {1968b7d3-e3bf-4ceb-99e0-cb7c913317bb}

I have no idea what to do or how to apporach this issue.

Does anyone have any idea what I am dealing with here?

Thanks in advance for looking!

[stefan.becker]

VBOX extension pack installed on the host?!