Navision 3.5 Dos. ODBC Conection to SQL

Can any one help me our company runs Navision Dos 3.5. I need to know if there is any one who has connected or can remember how to conect  so that read and write to the tables of this version of Navision to SQL is avalable.

We have the ODBC drives but there is a problem with the licence not beeing able to connect to the Database.

Is there any guys in the UK that have experience on this Dos system and that would like to urn some money in getting this connection working?