Hi there! I’m sorry to hear that you’re having trouble making purchases in FarmVille 2 despite having the correct card details. I’d like to help you get this sorted out. To start, could you let me know if you’re seeing any specific error messages when trying to purchase, or if the purchase just doesn’t go through at all? Also, are you trying to buy in-game currency or specific items?

In the meantime, here are some basic steps to try that often resolve purchase issues:

1. Check Payment Method: Ensure your payment method is valid and linked correctly to your app store account on your Windows device's WebKit browser.
2. Update the Game: Make sure you’re running the latest version of FarmVille 2, as older versions might have purchasing issues.
3. Clear Cache and Restart: Clear your browser cache and game cache, then restart the game and attempt the purchase again.
4. Stable Internet Connection: Confirm your internet connection is stable.
5. Payment Restrictions: Sometimes, the game's screening system may block purchases temporarily based on certain criteria unrelated to card details. This could be a reason why your card details look correct but purchases don’t go through.

If these don’t help, I can guide you through more advanced troubleshooting or possible next steps. Let me know what you find or if you’ve already tried any of these!