If you've followed the steps but are still having issues, double-check your paste for any unwanted spaces or characters in the object ID. Also, verify that your Sui wallet is correctly set up to approve transactions.

To successfully map a SuiNS to your Walrus Site, start by accessing the 'names you own' section on SuiNS.io or Testnet.SuiNS.io. Locate the name you intend to map, click on the 'three dots' menu, and choose 'Link To Walrus Site'. Then, paste the object ID of your Walrus Site in the provided field, verify its correctness, and hit 'Apply'. Once the transaction is approved, your site should resolve correctly.

Ensure that the object ID you are linking to is indeed the correct and active one for your intended Walrus Site. If you've previously used 'Link To Wallet Address', it's advised to update this to 'Link To Walrus Site' to avoid compatibility issues.