Cannot established connection using both wired and wireless connection

Cannot established connection using both wired and wireless connection

I am using both wired and wireless connection at the same time, I have set
up my wired connection ip address manually for LAN and a wireless
connection as DHCP for internet, but i cannot used at the same time. A
wireless connection can connect internet only if the wired connection is
disabled, while enabling both the connection a wireless connection cannot
connect the internet. Please help..........