[CC 1.5.7] [LAN] My brother's minecraft crashes when i place CC Monitor

So i am playing with my brother via lan, i was placing a monitor block {Was making a TV with a computer behind]
Note: I am using CC 1.5.7 because of OpenCCSensors

I placed the monitor block.and he suddenly crashed.When i went to his computer this is what i saw

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x0000000069a73b90, pid=1272, tid=1636
#
# JRE version: Java(TM) SE Runtime Environment (8.0-b120) (build 1.8.0-ea-b120)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.0-b62 mixed mode windows-amd64 compressed oops)
# Problematic frame:
# C  [atio6axx.dll+0xa53b90]
#
# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
#
# If you would like to submit a bug report, please visit:
#   http://bugreport.sun.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#

I dont know what is wrong,It just crashes the atio6axx.dll driver when i place a monitor block.
I dont have a crashlog i copied this from some guy which had the same issue

the graphic card is ATI Radeon 1550 (PCI)
and running under Win7

Try updating your graphics card drivers to the latest drivers for that card. There was a similar bug posted recently, and that fixed it. Also, on the last page of the OpenCCSensors topic is an unofficial build that is CC1.63 compatible, or you can use CC1.58 with the build you are currently using, just FYI.

Anyways the drivers were updated to latest as soon as i installed it btw and when i break all monitor blocks in my world he can play again with no crashes

Edit:Also the issue appeared two days ago,before even when i had the monitor blocks it worked correctly

Again, make sure you have the latest drivers for that card. That appears to be a relatively old model, so you will probably need an older driver than the "latest" so that your card has the best available support. Since it is the driver that is crashing, that's the best place to start trying to troubleshoot this, so it would be helpful for you to verify that you indeed have the correct version of the driver installed (which may not the very latest).

Assuming a desktop Radeon X1550, this should be the correct download. Note that ATI might not've released a fix for your model, monitor (or even just ComputerCraft) blocks aren't the only trigger, and all this is under the assumption that your crash log does refer to that same DLL.

however if i place a single monitor block everyting is ok,but when i join multiple monitors it crases,My computer which has AMD radeon 7700 never crashes because of that

That doesn't change anything.

nvm,suddenly the crashing when joining monitor blocks together is gone.idk why,all i did is replace the ComputerCraft 1.6.3.jar with ComputerCraft 1.6.jar and it was gone,

OFF TOPIC:Also,i am gonna make an alpha stage os soon (About 3 hours - 1 day)