Matrox Triple Head not recognized!!

[emilianomorgia]

Work here :

Hardware:

Hardware Overview:

Model Name: Mac Pro
Model Identifier: MacPro1,1
Processor Name: Dual-Core Intel Xeon
Processor Speed: 2.66 GHz
Number Of Processors: 2
Total Number Of Cores: 4
L2 Cache (per processor): 4 MB
Memory: 2 GB
Bus Speed: 1.33 GHz
Boot ROM Version: MP11.005C.B08
SMC Version: 1.7f10
Serial Number: CK7100RYUPZ


Graphics/Displays:

ATI Radeon X1900 XT:

Chipset Model: ATY,RadeonX1900
Type: Display
Bus: PCIe
Slot: Slot-1
PCIe Lane Width: x16
VRAM (Total): 512 MB
Vendor: ATI (0x1002)
Device ID: 0x7249
Revision ID: 0x0000
ROM Revision: 113-A52027-202
EFI Driver Version: 01.00.202
Displays:
Display:
Resolution: 2400 x 600 @ 60 Hz
Depth: 32-bit Color
Core Image: Hardware Accelerated
Main Display: Yes
Mirror: Off
Online: Yes
Quartz Extreme: Supported
Rotation: Supported
Display:
Resolution: 2400 x 600 @ 60 Hz
Depth: 32-bit Color
Core Image: Hardware Accelerated
Mirror: Off
Online: Yes
Quartz Extreme: Supported
Rotation: Supported

Software:

System Software Overview:

System Version: Mac OS X 10.5.5 (9F33)
Kernel Version: Darwin 9.5.0
Boot Volume: Cat Os
Boot Mode: Normal
Computer Name: Catalyst01
User Name: Catalyst 01 (catalyst01)
Time since boot: 15 minutes