It looks like you are trying to access an Access database using a SQL Server connection object. (The connection config refers to the Jet database engine)
You should be using an OleDbConnection
(and related OleDbCommand
, etc.) instead.
For more information on connection strings see: http://connectionstrings.com/access
And, as was mentioned in the comments, your code is succeptable to SQL Injection attack. You might want to read up how to protect yourself from SQL Injection Attacks (The article is for SQL Server, but many of the concepts are also applicable to Access)