DCE/DTE connection Help

I need Help, I am connecting 2 routers with DCE/DTE crossover cable

router 1 , serial 0 _ connected to router 2 serial 1

router 1 ( DCE end connected )

interface Serial0
 bandwidth 64
 ip address 192.168.4.1 255.255.255.0
 no ip directed-broadcast
 encapsulation frame-relay
 keepalive 29
 clockrate 64000
 no frame-relay inverse-arp IP 20
 frame-relay local-dlci 20

router 2 ( DTE end connected )

interface Serial1
 ip address 192.168.4.2 255.255.255.0
 encapsulation frame-relay
 bandwidth 64
 no fair-queue

When I connect the cables the interface shows up then goes to down
and I can't get the two routers to see each other.

What should I do to get communication between these routers?

Any Help is Greatly Appreciated