boot manager unreadable ati 9600 two monitors

Boot Manager unreadable with ATI 9600 and two monitors

Boot manager display a unread green bar when when two monitors are connected to a ATI 9600, one standard via SVGA connector and the other DVI with Components Adapter to Proyector. This happens after Vista Beta 2 installation, to installed I disconnected the DVI monitor, but when I connected again the DVI I cant read the boot manager.
Computer: ASUS A8V, AMD Athlon™ 64 X2 Dual-Core, ATI Radeon 9600, 2Gb memory.

Boot Manager displays an unreadable green bar with ATI 9600 and two monitors, one standard connected to SVGA and a projector connected by components adapter to DVI port. To install Vista Beta 2 I need to disconnect the DVI due to unreable screens, after installation boot manager was unreadble. After boot vista display ok but only on SVGA.

Windows Vista

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