We have MP2001 and a csv file with OS gridrefs for the UK. If you use MP wizard to import it works fine, but using the programatic way using .ImportData it doesn't understand the data. i.e
Set oDS = .ImportData(szconn, geoFieldOSGridRef, geoCountryUnitedKingdom, geoDelimiterComma, geoImportFirstRowNotHeadings)
If the CSV has Zip codes it is fine, but not with OS Grids.