Ps3 Crash/freezing issue with Dead space 3

I have 2 Playstation,

A old  fat 40 GB hard drive change for a 500GB model CECHH01

And a new super slim model CECH-4001C LW 500GB

I bought the digital download and I cannot play any co op mission since It always freeze

I also reformat my playstation 2 time both and still have the issue I redownload the game 3 times still have the issue

Both are doing crashes at any time so far here all the location I had the freezes/crash

1. Prologue as soon as the blizzard fade of the game freeze
2. capter 7 during the ship sequence (during the flying sequence)
3. on chapter 8 as soon as you get out of the ship at the beginning
4. on chapter 18 when you have to flight between the 2 alien station
5. on capter 9 I cannot load this chapter it always freeze a soon as the loading on the right corner disappear
6. Doing a save and quit always freeze during to loading back to the main menu
7. if you press the playstation button on the remote durin a video sequence it froze

These are all the location I was able to see at the moment

To give you a history of what I have done is:

I bought the digital downlaod on my first one 

As soon as I start the game for the first time during the prologue it froze over and over at point 1

then my playstation start to do the recovery each time I powered it back ON so I was thinking the playstation was the trouble

I bought a new one the super slim model

Then A have done a complete transfer from one playstation to he other

Stat the game and Worked fine for a complete playstrought 

then now I want to do the collectible and it always froze

I then formated both playstation and try again and both are doing the same thing...

Thanks in advance I hope this will help you located the trouble

If I removed my ethernet cable from the back of my Ps3 I'm able to play offline

I try to not connect myself to EA 

and I try via Wireless 

Always the same trouble only when my PS3 is not connected to any network that I can play normally

I have a digital version