Oledb Exception was un handled

hi,

i am getting an error that Oledb Exception was un handled , Syntax error in UPDATE statement.
this is my query
OleDbCommand cmd1 = new OleDbCommand("update adminLogin set password=' " + textBox3.Text + " ' where name=' " + label6.Text +" ', con);
con.Open();
cmd1.ExecuteNonQuery();
con.Close();