Can you send me a copy of your Links.def and a couple of lines from the top of the file you are trying to import?

I can give you the SQL command to put into the SQL Monitor to import the links from a file. As long as the fields line up ok, you can use the LOAD command to import a file, and bypass some of the problems.

Otherwise, you can import the database to a new temporary table, then insert all the records from that old table into your current Links table, and MySQL will line up the fields for you.