ODBC problem with Navision 2.50

Hi! We have navision 2.50 running with its own database. Until last week I always imported some navision tables into access xp with odbc. We have one very big table and last week that table got a new column. Since that time my access odbc import with that table is not more running. In access the import of this table is hanging. It seems that this table is too big for import over odbc. Has anybody an idea? Thanks Fred