McAfee webscanx.exe error message: "The memory can not be "read."

[ssum]

I am using Windows 2000.

My McAffee Anti Virus worked well until I think after a Windows Security update although I cannot positively relate the change to this. Now WebScanX.exe gives this error message:
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Webscanx.exe Application Error
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The instruction at "0x00000000" referenced memory at 0x00000000".
The memory could not be "read".

Click on OK to terminate the program
Click on CANCEL to debug the program

..............[OK]............[Cancel]
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If I click CANCEL I get this debug message in Microsoft Visual C++:

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Microsoft Visual C++ .................................................. ............[x]

( i ) Unhandled exception in WebScans.exe: 0xC0000005: Access Violation

................................................[ OK ]
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What is going on here?

Thank you.
SS

[Spider]

Your using an old version of Mcafee VirusScan. You'll have to upgrade.