setting up printing with usb print server router combined

I need help bad many hours invested and I am loosing my hair fast

 

I have a desktop dimension 4600 running xp and a inspiron E1505 with Vista

 

This is what I have done so far

 

Went from desktop 10/100 ethernet card to wireless router with cat 5 cable

Went from router to DSL modem with Cat 5 cable

Connected printer to USB printer port on router/server

 

I can access internet and print after setting up printer location IP address everything good

 

Now I move onto laptop

 

It recognizes router and connects to the internet

 

I cannot get it see the printer.  I have read about shared printing but what I want to do is access the printer without going through desk top.  Since printer is connected to a wireless router with usb print server should I not be able to print to it directly from laptop?

 

I moved right along setting up desk top not being able to on lap top is hurting me any help is appreciated.  Do I need to change settings on desk top?  With desk top off I can still access internet with laptop and assume I should see printer also.