System.Data.OleDb.OleDbException: Syntax Error In INSERT INTO Statement.

Hi All
 I'm having a bit of trouble with an sql statement being inserted into a database - here is the statement:
  string sql1;
sql1 = "INSERT into Customer (Title, FirstName, FamilyName, Number, Road, Town,";
sql1 += " Postcode, Phone, DateOfBirth, email, PaymentAcctNo)";
sql1 += " VALUES (";
sql1 += "'" + TxtTitle.Text + "'," ;
sql1 += "'" + TxtForename.Text + "'," ;
sql1 += "'" + TxtSurname.Text + "'," ;
sql1 += "'" + TxtHouseNo.Text + "',";
sql1 += "'" + TxtRoad.Text + "',";
sql1 += "'" + TxtTown.Text + "',";
sql1 += "'" + TxtPostcode.Text + "',";
sql1 += "'" + TxtPhone.Text + "',";
sql1 += "'" + TxtDob.Text + "',";
sql1 += "'" + TxtEmail.Text + "',";
sql1 += "'" + TxtPayAcc.Text + "')";
 Which generates a statement like:
INSERT into Customer (Title, FirstName, FamilyName,
Number, Road, Town, Postcode, Phone, DateOfBirth, email, PaymentAcctNo) VALUES ('Mr','Test','Test','129','Test Road','Plymouth','PL5
1LL','07855786111','14/04/1930','mr@test.com','123456')
 I cannot for the life of me figure out what is wrong with this statement. I've ensured all the fields within the database have no validation (this is done within my ASP code) that would stop this statement being inserted.

 
Line 158: dbCommand.Connection = conn;
Line 159: conn.Open();
Line 160: dbCommand.ExecuteNonQuery();Is the line that brings up the error - I presume this could be either an error in the statement or maybe some settings on the Database stopping the values being added. Any ideas which of this might be ? I'm not looking for someone to solve this for me, just a push in the right direction!
 Thanks!