Personal hotspots?

When trying to use my iphone (4S) as a personal hotspot

For my macbook pro and navigate the web. I am not able

To connect to Internet. In lieue of seeing the wi-fi sign, I see the

The 2 chain links and the padluck. Also, when trying to connect

My iphone to the computer via Bluetooth, i receive a message saying that I do not

Have the appropriate service? Is it a problem related with the ISP

(internet Service Provider)?