Trouble after clicking submit button

Clicking on the Buy Now button is supposed to redirect the buyer to PayPal through an intermediate (product description) page. Depending on how fast the redirection happens, you may or may not see the intermediate page.

Clicking on the product name, however, is supposed to show the product description.

It’s being directed to PayPal, but it’s not directing it to the checkout page. It’s redirecting it to the PayPal homepage.

When I try to activate the plugin, there is a fatal error that says:

Fatal error: Uncaught exception ‘Exception’ with message ‘SQL Query fails (Unknown column ‘category_id’ in ‘field list’):

INSERT INTO wp_ezpp_templates SET name='download_page', value='<h4>Download Page for {product_name}</h4> 

 <p>Dear {customer_name},</p> <p>Thank you for purchasing {product_name}. Here are your purchase details:</p> <table align="center"> <tr><td>Product Name: </td><td> {product_name}</td></tr> <tr><td>Purchased Price: </td><td> ${purchase_amount}</td></tr> <tr><td>Transaction ID: </td><td> {txn_id}</td></tr> <tr><td>Your email: </td><td> {customer_email}</td></tr> <tr><td>Purchase Date: </td><td> {purchase_date}</td></tr> <tr><td>Download Time Limit: </td><td> {expire_hours} hours</td></tr> <tr><td>Download Expiry: </td><td> {expire_date}</td></tr> </table> <p>Please find the download in /home/content/68/11097968/html/wp-content/plugins/easy-paypal-lte/DbHelper.php on line 174

Looks like I will need more details to troubleshoot this one. Could contact me on gmail? My WP user id at gmail. Thanks.