BGP Flapping between EBGP configuration with Loopback address?

R1--------------------------R2

R1Loopback - 1.1.1.1/24                              R2-2.2.2.2/24

F0/0 - 12.1.1.1/24                                         f0/0 12.1.1.2/24

configuration R1

!

Router BGP 100

neighbor 2.2.2.2 remote-as 200

neighbor 2.2.2.2 ebgp multihop 2

Neighbor 2.2.2.2 update source loopback1

Network 1.1.1.0 mask 255.255.255.0

Router eigrp100

Network 12.1.1.0

Network 1.1.1.0

No auto-summary

R2--

!

Router BGP 200

neighbor 2.2.2.2 remote-as 100

neighbor 2.2.2.2 ebgp multihop 2

Neighbor 2.2.2.2 update source loopback1

Network 2.2.2.0 mask 255.255.255.0

Router eigrp100

Network 12.1.1.0

Network 2.2.2.2

No auto-summary

1.there is no route in BGP table

2. Route 1.1.1.1 and 2.2.2.2 getting from EIGRP or sometime 1.1.1.1 is getting from EIGRP and 2.2.2.2 from BGP

2. Neighborship Flapping after holddown time expire

4. Showing loop in BGP RIB

What could be the issue ? what is the reason