Can't join any server:

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For some reason, I can't join any server. Whenever I try to join one, it takes longer than it should to join and once I'm in, it says "You have lost connection the game"! It could be related to my account as when I launch the setup in the game's directory and enter my username and passsword, it stops responding for a while then the setup finishes. I've already tried uninstalling and reinstalling RBLXDev, deleting the rblxdev_uid.bin and rblxdev_upw.bin files, I don't know what else to try to fix the solution. Really, I'm not sure what is happening or how to fix this.
Now I've just launched the setup in the RBLXDev directory and when I enter my Username and password, it pops up with this: http://i.imgur.com/mJXrYfb.png?1

Could this most likely have something to do with my account? However I've already tried uninstalling and reinstalling and still, it doesn't work.
Download and install Net Framework 4.5, you need that for authentication.

https://www.microsoft.com/en-us/downloa ... x?id=30653
Run the setup as admin.
KayKayKo wrote:Download and install Net Framework 4.5, you need that for authentication.

https://www.microsoft.com/en-us/downloa ... x?id=30653
I've already installed that. It still doesn't work.
khanglegos wrote:Run the setup as admin.
I've tried that already. It still doesn't work.
Just try to install a crap ton of updates and that might work, that has worked for me before.