RegRead question

I've used RegRead in many of my scripts successfully but this time I need just a little help.

This super simple:

$reg_1 = RegRead ("HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows","AppInit_DLLs")

MsgBox (4096, "RegScan",$reg_1)

with Regedit, AppInit_DLLs = C:\PROGRA~2\Sophos\SOPHOS~1\SOPHOS~2.DLL

with msgbox, AppInit_DLLs = C:\PROGRA~2\Sophos\SOPHOS~1\SOPHOS~1.DLL

Does anyone happen to know why this would happen? Any assistance is appreciated.

Lavelle