New connection of Linkstation

[RHE]

I have a linkstation 441D. It worked fine untill I changed my router to new one and now I have troubles to make a connection to my NAS. The new router recognizes linkstation but can't connect to it. I thought that when I uninstall the NAS navigator and reinstall it, the new connection will be made. It did't work. So, I have a couple of questions. How can I make a new connection? Do I have to initialize my linkstation to factory defaults and if I have to do that, will all my saved data be lost? I would be very grateful if somebody could give me some help. Thank you!