Setting up bridge connection

Q:
wifiTwo days ago I bought TP-Link TL-WA5110G 54 Mb High Power Wireless Access Point. The office Internet use by TP-Link TL-WR642G 108M wireless Router, connected to the Internet service provider through WAN. So seamlessly use Internet computers on the local network and laptops – wireless.
My questions are:
1. Can the TL-WA5110G 54 Mb High Power Wireless Access Point can replace TL-WR642G 108M wireless Router? Is there any fineness settings because supposedly gokonfigurirah exactly (AP router mode; MAC; PPoE; user; password), but never managed to tie and can not access the Internet company that is associated with TL-WA5110G 54 Mb High Power Wireless Access Point in the LAN.
2. Try connecting wirelessly TL-WA5110G 54 Mb High Power Wireless Access Point with TL-WR642G 108M wireless Router. In this case, my idea was to use the TL-WA5110G 54 Mb High Power Wireless Access Point as AP client router, which receives a wireless signal from TL-WR642G 108M wireless Router and transmits it through the company LAN. I configured according to the directions, but could not get their hands on net. I tried to use it as a repeater.
Only performance when you configure TL-WA5110G 54 Mb High Power Wireless Access Point as an AP and put it on the local cable network (LAN), which comes from the switch to the TL-WR642G 108M wireless Router. Thus configured, TL-WA5110G 54 Mb High Power Wireless Access Point could already use a wireless router, i. E. Bezchizhen used the Internet in the office through.

A:
I recently dealt with a TL-WR543G, who had AP Client mode, which turns off the WAN port and Wireless-a soil work as WAN. I.e. wirelessly receives net (in the settings of Wireless-a configurable to any Wireless to bind with passwords, etc.) and is dealt with new subnet via DHCP of lan ports.

The animals had a problem with configuration and settings Sometimes after “AP Client mode” worked like an ordinary router (WAN -> LAN + WIFI), and in “AP mode” working as described above (WIFI -> LAN).
Once configured in a mode (even wrong) – remains to work in such as not changing the settings.

I guess “networks” of supplier you that the first router and second router do not match (such as address / mask).