What if the number of events does not increase/nothing gets recorded in Vugen load runner?

While recording in load runner Vugen some of the events are not recorded?what is the reason for this?

check the following

1. The selected protocol might not be correct
2. The action currently recording does not use the protocol that is being specified in the script. The number of events will not increase till it comes across the protocol that is specified.
3. The activities that are taking place are client side and not server side. This will not get recorded.