HDTV question

Hi all,
Does anybody try to play movies over 1024x1024 via mga_vid?
On sources 720p 1280x720 for example mga-vid works but  I have 3 areas, Left 
side of the screen show right side of the picture right side of screen shows 
left side of picture, center is ok.
Its look like this.  Left and write side has changed
 -----------------------------
|     |               |     |
|  1  |       3       |  2  |
 -----------------------------
Zone 1 and 2 are switched, zone 3 is ok 

I have Matrox G450 16M Dual head 

Matrox MGA G200/G400/G450/G550 YUV Video interface v2.01 (c) Aaron Holtzman 
& A'rpi
mga_vid: Found MGA G400/G450 at 0000:01:00.0 [0000:01:00.0]
mga_vid: MMIO at 0x42e10000 IRQ: 9  framebuffer: 0xF0000000
mga_vid: OPTION word: 0x400A1120  mem: 0x04  SDRAM
mga_vid: RAMSIZE forced to 16 MB
syncfb (mga): IRQ disabled in mga_vid.c
mga_vid: 1 supported cards found
mga_vid: using major: 178 (assigned or default!) 

I have exactly the same problem with xvidix 

On 1080p ( 1920x1080) mga_vid filed to initialize xvidix is working but zone 
1 and 2  are wide  and  zone 3  is narrow 

 -----------------------------
|         |     |           |
|  1      |  3  |       2   |
 ----------------------------- 

I am sorry but i am not able to send screenshot. 

Sorry for the english. 

Blagovest Lazarov