Care to give some details, so we know what you're talking about?
Spaces where: in the text contained in the cell, or in the field names
specified on the first row? How are you importing: through the File | Get
External Data menu option, using the TransferSpreadsheet method in VBA, or
using the TransferSpreadsheet action in a macro? Do you get any error
messages? If so, what are they? What versions of Access, Excel and, for that
matter, Windows?