You cannot just connect two routers one after the other- what you need to do is to set the wireless router as a "Wireless switch" - it means that it won't preforme as a router it will preform just as a broadcasting device.

you also need to set it to be on the same subnet that the first router is on- since you didn't specify the make and type of the first router it will be very hard to answer this question.
what I suggest is that you call the support of either the wireless router or the other router company and they let them know that you need to "set the wireless router as a switch to the first router" and they will be able to guide you how to do it.