BGP over NAT Config Issues

Hi Expets,

I have tried BGP over NAT configuration.But I got some issues.Please advice for the following scenario:

1.Connecting 2 routers (R1 and R2) directly connected and form ebgp peer b/w these 2 routers using public IPs and established peer successfully.
2.LAN subnet is connected behind R1 router( customer Rtr)
3.Now configure NAT as follows:
a.For example LAN segment is (10.10.10.0/24).so inside interface configured as "ip nat inside" and outside interface configured as "ip nat outside"
b.create a access list Like " ip access-list 1 permit any any"
c.configure a "ip nat inside source list 1 interface fa0/0 overload"

4.once configured NAT,the BGP peer is down.Why ?

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for example if configured using "ip access-list 1 permit 10.10.10.0 0 0.255.255.255 and bind with outside interface  "ip nat inside source list 1 interface fa0/0 overload" command

It works fine.

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Thanks