Thanks for tips BrickVoid but for the story, the most strange is that happened the same thing of my friend in the server... Same error (ticking screen)
I searched previously on Internet : seems like a corrupted ... thing ? xD (Entity, Block, i don't know :/)
That's why i need help :/ Can't find this information on the crash report ><
I'm not sure if this would have anything to do with your crash report, but I just noticed this in the raw paste data from your paste:
EnderIO: Found the following problem(s) with your installation: "An unsupportted old RF API is installed (1.7.10R1.0.0 from Minechem-1.7.10-5.0.5.406.jar). Ender IO needs at least 1.7.10R1.0.2 and will NOT work with older versions." This may have caused the error. Try reproducing the crash WITHOUT this/these mod(s) before reporting it.
Maybe that is a possible cause of your problems? If you read further down the report, you might find more error information such as that. Can you reproduce the same error without all of the extra mods you added into the pack? There quite obviously are other mods in this crash report, mods that don't have anything to do with the FTB Infinity pack. For instance, why is Mekanism in the pack? if you do not get these errors with only the mods that FTB installed itself, add in the mods one and only one at a time, and see if any single mod you add to the pack gives you the same crash report or a similar crash report. If it does, you need to do more research, and find the correct version that will work with the mods in the pack, or you might need to configure the mod in question.
The next step after this, if any single mod doesn't give the error, it means it's possible there may be a conflict with two or more mods you've added in yourself. The process is simple, add in two mods, attempt to load the pack, repeat, until you've found something that might pinpoint the probable cause of your crash. It might be a long drawn out process of elimination, but eventually you should find mods that will cause crash reports, and the rest are good to go in the pack. You'd either update the ones causing the crash or remove them, it's up to you.
One last thing, if you can get the server to copy a report of the mod loading process into a file somewhere, then you should do that and paste the results you get here, as you might get additional information in that report that might pinpoint what is happening.
Cheers ...
BrickVoid