Testing - GET API call

Hi All

I am running a simple GET call . It works fine on VUGEN , no issues. The response is fine.

On LRE when I run the test , I get this message:

Error: The Vuser protocol or the current test settings do not support threads. ( I am using Wed- HTTP/HTML protocol)

does that mean I need to switch to a different protocol eg web services ? 

thanks

Mai