Hey,
It sounds like you might be having some issues with the connection setup. It's a bit tricky without knowing your specific setup, but I'd suggest double-checking your credentials first. Ensure that your username, password, and security token are correct. If you're still having trouble, it could be something to do with permissions - make sure the user you're connecting with has sufficient rights. Also, confirm that your Salesforce instance is accessible and there are no network issues. If all else fails, you might want to reach out to your Salesforce admin or the Salesforce support team for further help.
Hope you get it sorted soon! 😀