Windows XP is not recognizing RAM properly

I have a Toshiba A65-S126 Satellite Laptop which is running Windows XP sp3. I recently upgraded the RAM from a 256 mb to a 1gb plus the 256 mb built into the motherboard should gave me 1.25 gb. When I start it, the BIOS indicates 1.24 gb of RAM but Windows only recognize 512 mb. The boot.ini shows no maxmem settings (see below). Anybody have any suggestions??

[boot loader]
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Home Edition" /forceresetreg /fastdetect /NoExecute=OptIn
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  1. UPDATED - When I first start the computer after it has been off for a while, the Computer Properties shows the RAM as 1.18 GB, but shortly (few Seconds) after Windows finishes loading I get the blue screen of death (PAGE_FAULT_IN_NONPAGED_AREA) and when Windows restarts, it just shows 512 MB but the computer runs fine (just slow), Could this be bad memory?
  2. so you have ONE stick of 1GB memory and one stick of 256MB?
  3. adamh9 said:
    so you have ONE stick of 1GB memory and one stick of 256MB?

    No, just one stick of 1 gb and it has 256 mb RAM built into the motherboard.
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