Router - modem communication issue

Hello,
I've been using serviio in the past weeks for streaming movies/pictures to my TV and I really love your program.
Recently I have plugged my desktop (streaming machine) directly to the modem - Cisco EPC3925 - and my desktop does not detected any other devices anymore. I used to have all my devices (laptops, desktop, TV etc.) connected (plugged or WiFi) to Negear WNDR3700 router and everything worked flawlessly then.
Also, I can't connect to the modem's website via desktop. I can access it from my laptop. (even though it is connected to the router via wifi)
I have a static IP so I had to set up IP adress, subnet mask, default gateway and dns servers. Afair I had to use other mask than the one technician gave me to make it work - maybe it is the reason?
So the question is: how do I make all the devices plugged to the router visible for my desktop, which is plugged to the modem? Is is possible?
Why not plug it back? Because router caused some strange delay in World of Warcraft.
Hope everything is understandable and I'll get some help.
I've been using serviio in the past weeks for streaming movies/pictures to my TV and I really love your program.
Recently I have plugged my desktop (streaming machine) directly to the modem - Cisco EPC3925 - and my desktop does not detected any other devices anymore. I used to have all my devices (laptops, desktop, TV etc.) connected (plugged or WiFi) to Negear WNDR3700 router and everything worked flawlessly then.
Also, I can't connect to the modem's website via desktop. I can access it from my laptop. (even though it is connected to the router via wifi)
I have a static IP so I had to set up IP adress, subnet mask, default gateway and dns servers. Afair I had to use other mask than the one technician gave me to make it work - maybe it is the reason?
So the question is: how do I make all the devices plugged to the router visible for my desktop, which is plugged to the modem? Is is possible?
Why not plug it back? Because router caused some strange delay in World of Warcraft.
Hope everything is understandable and I'll get some help.
