USB flash memory sticks use different types of chipsets (controller).

Depending on the type of chipset, correct driver is required.

For 64mb, v1.1, use one of the following drivers:

Driver 1 (STF_O_USB11) / Security Password Software / Manual for Security Password Software

Driver 2 (STF_AU_USB11) / Manual

Driver 3 (STF_AU_USB12)

For 128mb or above, or 64mb-v2.0, use one of the following drivers:

Driver 4 (STF_O_USB20) / Security Password Software / Manual for Security Password Software

Driver 5 (STF_SM_USB20) / Manual

Driver 6 (STF_UT_USB20) / Manual for Driver / Security Password Software

Driver 7 (STF_AU_USB20) / Security Password Software