Pandaria Character Opening Bug

[MortoF]

When I login to my shaman it keeps kicking me out of the game but I can play with other characters perfect what should I do to fix this ?

[MortoF]

This is the massage that pops up every time i try to go to my shaman :
This application has encountered a critical error:

ERROR #132 (0x851000084) Fatal exception!

Program : D:/Mists of Pandaria 5.4.8 Minimal/Wow.exe
ProccesID: 56692
Exception: 0x00000005 (ACCES_VIOLATION) at 001B:004F29EB

The instruction at "0x004F29EB" referenced memory at "0x0000000C".
THe memory could not be "read".

Press OK to terminate the application.