Wilco Airbus A320 Error

Hi,

I bought the Wilco Airbus A320 series and every time I start up the engiens or just lift off the comuper sayes that there is a error. The error is that there is not enough graphics capacitie but my computer is strong enough to handel this.
Heres some data of my computer:

VISTA
Processor: Intel Core2 Quad CPU Q8300 @ 2.50GHz 2.50 GHz
Random Acces Memory (RAM): 4,00 GB
disc space (C): +- 640 GB
Graphic card: NVIDIA GeForce GT 230
Graphics memory: Well I can't find what the Graphics memory is I think it is well above 128MB

About the Add-On:

WILCO AIRBUS A320 SERIES
Microsoft Flight Simulator X or 2004
Pentium IV
1.5 GHz
256 MB RAM
64 MB Graphics (128 Mb for FSX)
Windows XP or Windows Vista (32 bit)
900 MB disk space
QuickTime Reader for Video

Hope you can help

Thomas