WMI invalid class error

I use the command 'wmic product' to list the installed software on either the

local or a remote computer. It works most of the time on x32 systems but when

I use it on XP x64 or server 2003 x64 systems I get an Invalid class error

0x80041010. Same story when using WMI in a script. Does anyone know what the

story is with x64 versions of Windows (Vista x64 works!). Another namespace

maybe?

Thanks,

Tom Gilmour

Tecsult Inc.