What's wrong with my SQL syntax?

OleDbCommand cmdInsertNewuser = new OleDbCommand("Insert Into Customer (Customer_ID, Customer_FName, Customer_LName, Customer_Address, Customer_Phone_Num, Pword)Values (" + Convert.ToInt32(UserIDBox.Text) + ", " + FirstNameBox.Text + ", " + LastNameBox.Text + ", " + AddressBox.Text + ", " + PhoneBox.Text + ", " + PwordBox.Text + ")", CustDb);