That key makes no sense, please try posting your real code. Wow6432Node should not appear in the path nor should HKEY_*, it should look like ReadRegDword $0 HKLM "Software\MyCompany\MyApp" "Version" or something like that.
When using Regedit on a 64-bit version of Windows you will see some keys under the Wow6432Node key but because NSIS is a 32-bit application all reads and writes go there by default so you should not use Wow6432Node in your .nsi.
IntOp $PostCount $PostCount + 1
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