VGA 256MB detected 64 MB at Windows 7 x86 when i play PES2010

Help me please,this problem was to old,but i want to ask now,
i've 256MB Video Memmory (based on Intel) and this is onboard,when i playing PES 2010,i've some error that PES detect my Video Memmory is 64,but when i checked in DXDIAG my video memmory is 251MB (i know 251mb from 256MB,because DirectX use some piece of my Video Memmory right?)
so how to solved my problem? sorry for my bad English,cuz i'am Indonesian

I don't understand you that much, but I think it is meaning that it is a 64bit videocard.