i'm not sure if this the right place to post this, but here i go....

right now, i'm helping a friend of mine........

he wanted me to connect the LCD and projector to the computer, and use it at same time.... what u see in the LCD must also be the same in the projector....... the video card is Nvidia Geforce 7500 LE(PCI-E)....

LCD is connected to the VGA(D-sub) and projector to the DVI-I with an adapter(DVI to D-SUB).... the cable of the projector is the same as the LCD cable(standard VGA cable).... but the length of the projector's cable is 25 meters long....

now, my problem are, when i turn on the computer, i can see some display in the LCD, but in the projector, nothing, it says NO-SIGNAL, so, i switched the two, i connected the projector to the VGA(D-sub) and LCD to the DVI-I with an adapter(DVI to D-SUB)..... now projector is working properly, u can see the display, but with the LCD, its say OUT OF RANGE, and u wont see the mouse pointer moving, only in the projector, i did adjust or configured the display size, it still didnt fix the LCD.....

how can i fix this problem?.... any idea?....

here are the specs:

OS: Windows Vista home premium
projector: Toshiba TDP-T90
videocard: Nividia Geforce 7500 LE(PCI-E)
projector's cable: custom made 25 meters(standard VGA)
LCD: Arnos F-17(cable monitor is fix)

hope to hear from anyone soon..... ty....