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Did anybody get the Mass Storage Device example to work?

Hi all,
I am trying to use the MSD example for an STR7. The enumeratation is complete, and I can read from the device, but never write to it (XP hangs). I saw that somebody solved the problem for LPC2146 by adding the following like to USB_Configure:

WrCmdDat(CMD_SET_MODE, DAT_WR_BYTE(INAK_BI)) ;

it seems that a NAK is not given back if there is no data.

Do you know what this means for the STR7?

Thanks

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