BlockingQueuedConnection is not working it is leading to deadlock condition.

[us@12]

Hi everyone,
I am uing Qt:: BlockingQueuedConnection in the connect option like below, but it going to deadlock state when i use this please help me in this issue soon am a newbie to Qt.. Here is my code

connect (this, SIGNAL(moduleDatarcvd(int)), this, SLOT(ShowModuleSimWnd(int)),Qt::BlockingQueuedConnection);

connect (this, SIGNAL(moduleDatarcvd(int)), this, SLOT(ShowModuleSimWnd(int)),Qt::BlockingQueuedConnection);

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here i am waiting for a signal to come when my ShowmoduleSimWnd method is called. please tell me an alternative that wath i can use.and for this blocking of my ui is happening. please help me