Can I mount USB disk in knoppix terminal?

I'm trying to open Hard Disc (sda) /mnt/sda using Konqueror

The message below popped up:
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Error - kio_devices_mountehelper <2>

mount: must be superuser to use mount

Please check that the disk is entered correctly.
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Floppy & CD ROM is working well in knoppix terminal, hoping USB disc can be automounted too.

Find out internet access in knoppix is comparable slower than my SuSE installation in harddisk, probably i i've my cached DNS enabled.

I had try to run the whole knoppix 3.4 in RAM, the application performance is superb!!! but knoppix terminal fails to load the image.

I'm trying to run knoppix 3.6 in RAM now, hoping to see it works. Or anybody can tell me any other knoppix variance can run the whole knoppix in RAM & the terminal server works?

Thanks.