Altera Cyclone III Serial Flash Loader (SFL)

[David]

Hi all,
I have quite a specific question here. I have a Cyclone III configured in JTAG mode only (MSEL pins connected to GND) and I want to use the SFL configuaration to program the EPCS4 config device through JTAG. I can succesfully program the SFL image but the programming of the config device always fails with the error message "Can't recognize silicon ID for device". After doing some quick googling it appears that the FPGA MSEL pins must be in AS mode for this part of the configuration? I am failing to see why this is the case as the whole purpose is to be able to program through the JTAG interface. Could anybody please shed some light on this?

Dave