emit not working in constructor

[vinothrajendran]

Consider the scenario:
I have 3 CLASS. 1st and 2nd CLASS can be accessed via 3rd CLASS..So i place a connect() inside 3rd CLASS connecting 1st CLASS signal() to 2nd CLASS slot().....But if i place my emit signal in 1st CLASS constructor, its not hitting the slot in 2nd CLASS....But in 1st CLASS, if i place a timer and in its timeout() i emit the signal then appropriate slot is called in 2nd CLASS...

I need to know the reason why emit is not valid inside 1st CLASS constructor....

NOTE: 2nd CLASS object is created before 1st CLASS..So there should not have been a problem with calling emit() from 1st CLASS constructor....