在ebay上 list an item，结果出来下面的 message ：
You cannot submit your listing due to the following problems
Attention Seller:
Thank you for choosing eBay.
In order to help maintain a safe trading environment, selling limits are occasionally placed on listings. For this item, the site on which the item is listed must match your site of registration, and the item can only be shipped within the same country. Please go back and make the necessary changes.
To participate in global trade on eBay, you may need to follow the steps below to verify your PayPal account. If you already have a verified PayPal account, and are still receiving this message, you need to link it to your eBay account. Once you have a verified PayPal account that is linked to your eBay account, you will be able to sell an item on any of eBay's sites worldwide.
1) For instructions on how to provide the necessary verifying information through PayPal, please click on your country of eBay registration below.
2) If you already have a verified PayPal account, and are still receiving this message, please link your PayPal account to your eBay account.
请问这是怎么回事？该如何修改？