[seanwitte]

It might be that the connection opened using the Jet provider can't handle a recordset and an update query at the same time. Just use an implicit connection like this:

Set MyConn = Server.CreateObject("ADODB.Connection")
	Set RS = Server.CreateObject("ADODB.Recordset")
	
	connectString = "Driver={Microsoft Access Driver (*.mdb)}; DBQ=" & MdbFilePath & ";"
	MdbFilePath = Server.MapPath("directory\todatabasefile.mdb")
	
	'open the recordset
	SQL_query = "SELECT * FROM files"
	RS.Open SQL_query, connectString
	
	'run the update query
	SQL_query = "UPDATE myTable SET myField = 'foo'"
	MyConn.Open connectString
	MyConn.Execute SQL_Query

If you're running SQL you should ALWAYS use parameterized queries or stored procedures. SQL injection is the easiest way for people to completely screw up your database.