How to access USB device if booted with Windows 7 64-Bit Recovery Disc

[clgfsc]

Hi all!
I just bought the Windows 7 64-Bit Recovery Disc and the and my PC boots from it as expected, but what a shame, I can not access a USB memory stick attached to it.
I actually expected this to work as it does on an other PC, but with 32 Bit OS. what do I have to do to get this access?

Please find below some information about my PC (sorry, it's in German, but I think you'll get it anyway):

System
Hersteller Hewlett-Packard Modell HP Pavilion dv7 Notebook PC Gesamter Systemspeicher 8.00 GB RAM Systemtyp 64 Bit-Betriebssystem Anzahl der Prozessorkerne 4

Speicher
Gesamtgröße der Festplatte(n) 466 GB Datenträgerpartition (C 390 GB frei (449 GB gesamt) Medienlaufwerk (D CD/DVD Datenträgerpartition (E 2 GB frei (17 GB gesamt) Datenträgerpartition (H 89 MB frei (99 MB gesamt)

Grafik
Grafikkartentyp Mobile Intel(R) HD Graphics Insgesamt verfügbarer Grafikspeicher 5093 MB Dedizierter Grafikspeicher 1280 MB Dedizierter Systemarbeitsspeicher 0 MB Gemeinsam genutzter Systemspeicher 3813 MB Grafikkarten-Treiberversion 8.830.6.1000 Auflösung des primären Monitors 1600x900 Auflösung des sekundären Monitors 1920x1080 DirectX-Version DirectX 10

 

[mqudsi]

Whether or not the WinPE environment of our repair CD has USB support is based mainly on your BIOS and what type of USB support it has.

 

[clgfsc]

Thanks for your reply!
Is there a chance to get access by loading some driver after the PC has booted up?

 

[mqudsi]

Perhaps. You'd have to contact your motherboard manufacturer for the USB chipset drivers.