> For the complete documentation index, see [llms.txt](https://doc.thordata.com/doc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.thordata.com/doc/faq/product-problem/why-is-it-not-effective-to-use-our-proxies-in-a-fingerprint-browser/1.-the-proxy-does-not-work-at-all.md).

# 1. The proxy does not work at all

1. Your operation mistake: when you operate on your own, the proxy may don't work due to some operational errors, such as wrong username or password input, unstable network environment, and our proxy does not support the network environment of mainland China.
2. Resource problem: After finding a business person to test and confirm, if the proxy still does not work, you can replace it with a new IP for free