The NK file cannot be downloaded with ATK tool.
To deploy images You may try ideas, suggested in the topic, linked below.
("Flashing a Windows CE 5.0 Device Without Using Platform Builder")
http://msdn2.microsoft.com/en-us/library/aa446908.aspx
The following should be done for it:
1.
We should apply TFTP client program, that may be configured for different ports
(standard TFTP port is 69). As was mentioned in the topic, the TFTP server in
the EBOOT boot loader uses non-standard TFTP port 980.
For example, WinAgents TFTP Client program may be used.
http://www.winagents.com/en/products/tftp-client/index.php
2.
EBOOT bootloader file ("Eboot.nb0") may be loaded and run on the board, using
external JTAG debugger or ATK toolkit
3.
Configure EBOOT to use static (non-DHCP) IP address, say, 192.168.2.75.
4.
Select EBOOT option "D) Download image now".
5.
Run tftp.exe to send the CE image (NK.BIN) to the board's IP address as follows:
"TFTP1 -i -p980 192.168.2.75 PUT BOOT.BIN".
Any file (in WinCE .bin format) to be loaded via EBOOT should be renamed as
"BOOT.BIN".
