CUPS + Router(DI-704P) W/ print server

[Aria Kokoschka]

So here's my story: I'm trying to share my printer (hpdeskjet 940c) which is 
connected to my router's print server (DI-704p) among all my machines (1 XP, 
1 XP server, 1 Slackware, 1 debain, 1 Solaris, 1 XP laptop). Of course, 
D-link has provided print server drivers for Windows machines but Linux/Unix 
as usual are neglected.

I tried to use CUPS to make my Linux machines take advantage of shared 
printer. I've set my printer on Linux as following:

/usr/sbin/lpadmin -p printername -E -v socket://192.168.0.1 -m deskjet.ppd

Now, everytime I try to print a page I get the following message from 
http://localhost:631/

"Network host '192.168.0.1' is busy; will retry in 5/1/5/30 seconds..." but 
nothing happens. I have tried to set the network interface to:

socket://192.168.0.1:515

As I witnessed that the printer and LAN machine are exchanging packets 
through destination port (on the router) of 515 when I ran Ethereal. No 
luck! I switched the protocol to LDP (ldp://192.168.0.1(:515) but that kept 
shutting down the printer as soon as a job was submitted. For some reason I 
get this message, "One byte of data was received" and the printer needs to 
be restarted. The content of Ethereal shows the LDP protocol keeps failing 
by issuing incorrect message or something but TCP packet exchange goes ok 
(Ethereal was run under Windows machine by the way).

So now I don't know what else I can do. Any ideas?