For some reason, SDT thinks you have a later version. I'm not sure why,
but for now try doing the following: find this line in SDTUtility.GetDriveSpace:

if GetVersionEx(@lcStruct) <> 0 and ;
inlist(.Hex2Decimal(substr(lcStruct, 17, 4)), 1, 2) and ;
.Hex2Decimal(substr(lcStruct, 13, 4)) > 1000

Add AND .F. to the end of the last line. See if that makes a difference.

Yuanitta