Wireless router experiencing problems when an Apple device connects via wireless?

We have a home router (CD-R King brand), everything runs smoothly until someone with an apple device connects to the network. I tried pinging google continuously, but when an ipad or iphone connects. The network goes down.

i've heard this problem from a friend.what's causing this problem?

I would contact the brand company of the router and see if they can help you with the situation, it could be the fact that apple products just simply CAN't connect