Bird imported from BGP doesn't have proper gateways

I'm having troubles in BIRD configuration, Let me share some background. There are 2 hosts, host A is 192.168.0.188, and host B is 192.168.0.224. And created the new IP address on the loopback interface:

1. host A(192.168.0.188)

• lo.0 2.2.2.1/32

2. host B(192.168.0.224)

• lo.0 3.3.3.1/32

I want to build routes between these 2 hosts. Let the host A be able to connect loopback IP address(3.3.3.1) on host B. After startup the bird on both hosts. The problem happened on the gateway when show the route information on host B:

$ birdcl show route
BIRD 2.0.7 ready.
Table master4:
0.0.0.0/0   via 192.168.0.1 on eth0           unicast [kernel1 21:03:59.593] (10)
2.2.2.1/32  via 192.168.0.1 on eth0           unicast [Uplink0 22:51:04.482 from 192.168.0.188] * (100/?) [i]

I was hoping the routes should have "via 192.168.0.188" instead of "via 192.168.0.1";

Below is the host setup and bird configuration:

# host A
ifconfig lo:0 2.2.2.1 netmask 255.255.255.255 up
ip addr add 2.2.2.1/32 dev lo

# Host B
ifconfig lo:0 3.3.3.1 netmask 255.255.255.255 up

Host A Bird configuration:

log "/var/log/bird.log" all;
router id 192.168.0.188;

protocol device {
  debug { states };
  scan time 2;
}

protocol kernel {
  learn;
  scan time 2;
  ipv4 {
    import all;
    export all;
  };
}

protocol direct {
  debug { states };
  interface "lo";
}

protocol bgp {
  debug { states };
  local 192.168.0.188 as 64514;
  neighbor 192.168.0.224 as 64514;
  ipv4 {
    export  filter {
      if ( net = 2.2.2.1/32 ) then { accept; }
      reject;
    };
    import all;
    add paths on;
  };
}

Host A Bird configuration:

log "/var/log/bird.log" all;
router id 192.168.0.224;

protocol device {
  debug { states };
  scan time 2;
}

protocol kernel {
  learn;
  scan time 2;
  ipv4 {
    import all;
    export all;
  };
}

protocol direct {
  debug { states };
  interface "lo";
}

protocol bgp {
  debug { states };
  local 192.168.0.224 as 64514;
  neighbor 192.168.0.188 as 64514;
  ipv4 {
    export  filter {
      if ( net = 3.3.3.1/32 ) then { accept; }
      reject;
    };
    import all;
    add paths on;
  };
}

Could you let me know what configuration is need to correct?