Default [Q] trouble mirroring my s4 to a LG Smart TV, can you help me?

This is the problem: when I try to mirror my s4 to the smart TV it appears to connect (first picture) and then from one second to another it just disconnects and it never starts mirroring (second picture).

I'm using a 4.4.2 Google edition ROM and my TV model is 42LN5700-UH
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