Minecraft 1.6 Crashing Multiplayer

My minecraft crashes whenever I click Multiplayer. I have tried updating my graphics drivers, re-installing Java, deleting the .minecraft folder and much more, nothing works! If there are no servers on my favourites I can click Multiplayer, but if I try to add a server or direct connect to one it just crashes with the following error:

Client> #
Client> # A fatal error has been detected by the Java Runtime Environment:
Client> #
Client> #  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x70894e60, pid=5880, tid=4188
Client> #
Client> # JRE version: 7.0_25-b17
Client> # Java VM: Java HotSpot(TM) Client VM (23.25-b01 mixed mode, sharing windows-x86 )
Client> # Problematic frame:
Client> # C  [FastIPLib.dll+0x4e60]
Client> #
Client> # Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
Client> #
Client> # An error report file with more information is saved as:
Client> # C:\Users\Vince\AppData\Roaming\.minecraft\hs_err_pid5880.log
Client> #
Client> # If you would like to submit a bug report, please visit:
Client> #   http://bugreport.sun.com/bugreport/crash.jsp
Client> # The crash happened outside the Java Virtual Machine in native code.
Client> # See problematic frame for where to report the bug.
Client> #
Client> AL lib: (EE) alc_cleanup: 1 device not closed
Game ended with bad state (exit code 1)
Ignoring visibility rule and showing launcher due to a game crash
Deleting C:\Users\Vince\AppData\Roaming\.minecraft\versions\1.6.2\1.6.2-natives-1402565887637
Couldn't delete C:\Users\Vince\AppData\Roaming\.minecraft\versions\1.6.2\1.6.2-natives-1402565887637 - scheduling for deletion upon exit

I have been looking for ages for a solution, please help!