FSX trava e desliga depois do REX4

Boa tarde cmtes.
Não sei se é o REX4, mas depois que instalei fui tentar fazer um voo e ele trava de desliga no meio, quando estou quase chegando.
Não tenho nenhum cenário instalado até agora. Só o ORBX Global e o REX 4.
Minha placa é uma HD6970. Não sei se já está velha e não aguenta mais o tranco?
Queria até ver sobre as configurações do REX4. Será que deixei de forma adequada?
Alguém temo programa e me daria uma dica?
Sobre o FSX, ele tá seco. Não coloquei nada ainda. Só o Trafego marítimo.
Já coloquei tudo que tinha que colocar no CFG. Não sei se tem alguma coisa errada.

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Alguém poderia me ajudar?
Grato.