Bgp problem "open failed: Connection refused"

Hey guys I am doing some labs to study about bgp, but I am doing a simple neighbor config, but doesnt work.

I have a router in a ibgp working fine, but I dicede to connect this router to a external AS "10", anyone could help me please ?

when I do a debug bgp:

*Nov 17 00:00:37.059: BGP: 20.0.0.101 open failed: Connection refused by remote host, open active delayed 18250ms (35000ms max, 60% jitter)

My configig

router bgp 10

neighbor 20.0.0.101 remote-as 30

The other router:

router bgp 30

bgp router-id 172.20.3.3

neighbor 20.0.0.102 remote-as 10

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Thanks