First off, Welcome to Blynk. Please format any code you post, as per the welcome instructions… use this key three times before and after any code you post.
Then…
a) What hardware (board) are you using?
b) If Arduino, have you tried USB-Link, until you get another ethernet shield?
c) Have you already gotten the DHT11 functioning on your hardware, without Blynk? If not, best to start with that. There are many, very simple examples, for the DHT11/22 series out there, simply Google DHT11. Then you can Blynkify it (and you can simply search this forum for DHT11 to see it done many times here). And finally trying to add BT link on top of it all.