Help. router problem

Would any body please can help me to solve the router problem.I have used a Belkin Router F5D8236-4 V.2 for 5 years. Sometimes, the devices couldn't connect with the wifi however it could reconnect by restarting the router for several times. ( no new firmware for updating )Recently, I bought a Samsung CLP-360W wifi Colour Printer with WPS. Having tried for hundred times, it was only one time to connect to the router for completing setup. After that it can't connect to the router once even use the WPS function. However, wireless devices are no problem and confirmed that the printer is alright because I can use it as an access point.

三星系咁,去问三星售后,睇洛似系个PRINTER既问题唔系ROUTER既问题,我加下都用紧三星,劲垃圾,都系以前佳能果部好

update the samsung driver
http://www.samsung.com/uk/support/model/CLP-360/SEE

Thank you. The printer's wireless is alright and can use as access point and communicate with smartphone app . I guess the problem is the router itself.

Thanks so much, but the driver installed is update one.