Solution to wifi authentication problem

[kashmerediore72]

Hello,
i'm christopher how should i do if i'm going to connect my samsung nexus to my wifi model d link dir 615 it says after authenticating, it says "authentication problem"

 

[nhasian]

you could try changing your wireless security type in your router.

 

[kashmerediore72]

will you please guide me how? help pleeaasse...

 

[789456123]

you could try changing your wireless security type in your router.

help full detailed