ODBC SQL Problem

[LBK Rules]

Well, I started creating a test program that enters data from a HTML table to a database.

I wrote this code, but I keep getting this error:

Warning: SQL error: [Microsoft][ODBC Microsoft Access Driver] Syntax error in INSERT INTO statement., SQL state 37000 in SQLExecDirect in c:\ibserver\www\ucs\create_user.php on line 22
Error in SQL

I can't seem to figure out the problem. I know I have everything setup correctly, and I don't understand why it's not working.

PHP Code:

<?php

//Include Config Information
require("config.php"); 

//Connect to Database
$conn=odbc_connect($dbname,$dbuser,$dbpass);

//If Connection Failed, Show Error Message
if (!$conn)
{
exit("Connection Failed: " . $conn);
} 

//Insert Data into Database
$sql="INSERT INTO Sellers (Username, Password, LastName, FirstName, Address, City, State, ZIP, Phone, EMail) VALUES ($UserName_TextBox, $Password_TextBox, $LastName_TextBox, $FirstName_TextBox, $Address_TextBox, $City_TextBox, $State_TextBox, $ZIP_TextBox, $Phone_TextBox, $EMail_TextBox)";

$rs=odbc_exec($conn,$sql);
if (!$rs)
{ 
exit("Error in SQL");
}

odbc_close($conn);

echo "Sucessful!";

?>

Note: I am using ODBC instead of MySQL since I am developing this for a server without MySQL.