Touch screen replacement problem

Hi all Members :)
I need a little help. I've replaced touch screen on my xperia SP. Everything seems to be ok, until I lock the screen. Then when I want to unlock the phone by press side power button, sometimes is touch screen not responding and looking dead, but sometimes not a everything working. During freeze is impossible to unlock phone using touch streen, it is not responding to any fingertip. Side buttons like volume up and down, power and camera button working normal.
Then I must to remove back cover a manually touch off button by pen. After power on phone everything work for few minutes, hours ... :rolleyes:
The touch touch screen ''freeze'' after power button press repeat daily about 5-10 times. :(
The freeze is ONLY when unlocking phone.

May it be by use touch screen from ebay? (maybe not original, I donť know) ... this model http://www.ebay.com/itm/291440460418...%3AMEBIDX%3AIT
I'm using Panadroid 4.4.4 ROM and before touch screen replace I have not any problems.

Please, help me :crying: