DP 300U
DP 300U's can get be pretty uncooperative when attached to a different router. One solution is to reset the DP 300U to its factory settings. Use the PS Admin software to do this. (If you lost the PS Admin software, you should be able to download it from the internet.) If the software prompts you for a password and you do not know it, try "SYSXXXX", where XXXX is the last four digits of the MAC address located on the underside of the print server.
After you reset the DP 300U you will need to set it up from scratch, a process which is not particularly intuitive. Refer to your "Quick Install Guide" (download it from D-link's web site if you don't have it anymore).
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