ok try this
i use the same plugin as you and i have no problems what so ever
what i do is i use a select statement to get the rows from the Dbase that i want
useing the
i set the field QUERY for instance with this.
"Select customer, custID, adres
where custID = '" & FIELDNAME & "'"
External("SQL-execQuery",QUERY&"|a|C:sql.tab")
Now i import the sql.tab in my filemaker dbase.
After changing the data i do an update
I set the field query with
"Update CustomerID with " & FIELDNAME & "Where customer name is piet"
External("SQL-execQuery",QUERY&|a|C:|sql.tab")
When someone makes a new record i just use an field where i enter if it was an imported record or a newly created record.
This system works fast and great. Making filemaker a client on a sql server.
Although i wouldnt use it in a place where you have to connect more then 1 computer using filemaker.
Good luck with this.