DSLR and compact flash cards

[jfpart]

I have a canon 30D and plugging it in via the usb adapter cable nothing happens or recognises the compact flash storage, i have  tried a multi card reader too also via the mico usb socket with usb adaper and still nothing,

do i need to tell the tablet something is there, or tell the usb socket to power such devices as a card reader,

any suggestions very welcome.

thanks

jfp

[santasteve]

set usb communications on canon to print/ptp shud see it as a disk drive

[jfpart]

thanks, will try later.

[jfpart]

still doesn't work, downloaded an app to monitor the usb connection and the error message was that s3c usb host driver not found or something similar, so have come to a dead end? and help anyone, thanks