# LPC1343 evaluation board USB bootloader not working?

My LPC1343 no longer shows up as a USB mass storage device.

I am using the following evaluation board for NXP's LPC1343:

http://www.embeddedartists.com/sites/default/files/support/qsb/lpc1343/LPC1343_QuickStart_Board_Users_Guide.pdf

I plug in with mini USB, file system opens. I deleted the default firmware.bin and loaded my own based on the code of this library: https://github.com/microbuilder/LPC1343CodeBase (without modifying)

I then pressed some combination of the reset and bootloader buttons. And now my device no longer appears on my Windows PC when I plug in USB (e.g. I can't see firmware.bin in device's folder).

Is it possible I accidentally activated a code read protection mode? I really hope not... http://www.nxp.com/documents/application_note/AN10968.pdf

Thanks for any help.