Hello All
I played Civ 5 perfectlly, until today where i had the same problem as many others, where it chrased after you choosed which directX you would play with and could not join the game.
Before that i have tried several things where non of them worked "re-install directx 9", update graphic card and so on.
BUT
After i completely re-installed Civ V where i had to dl and install it again, I have then no problems and can play the game again.
So if your game chrases right after you choose which directX then maybe re-install the game. IT WORKED FOR ME
Let me know if it works you aswell
I played Civ 5 perfectlly, until today where i had the same problem as many others, where it chrased after you choosed which directX you would play with and could not join the game.
Before that i have tried several things where non of them worked "re-install directx 9", update graphic card and so on.
BUT
After i completely re-installed Civ V where i had to dl and install it again, I have then no problems and can play the game again.
So if your game chrases right after you choose which directX then maybe re-install the game. IT WORKED FOR ME

Let me know if it works you aswell