Connection OK. Possible cause : invalid credentials

Hello,



I want to ask you my problem because i've already search on the web during many hours and i've find nothing.

With VirtualBox, i've installed 2008 R2 x64 (AD, DNS, WDS, DHCP), MDT 2012 and AIK. I use boot.wim and install.wim from a Windows 7 x86.

If I put the boot.wim and install.wim in WDS without touch MDT, i can boot on PXE client and the install can be does. But when i put the install.wim on MDT 2012 

and the saving the configuration in order to create a LiteTouchPE_x86.wim and put it on WDS, when i boot with the client, i've this message :

But i have a valid IP :

And i can access to my share :

And the log say me :

My BOOTSTRAP.INI :

[Settings]
Priority=Default

[Default]
DeployRoot=\\WIN-3O4VKF119F2\DeploymentShare$

I have do the same with VMWARE, (and a friend do it too in the same time with SKYPE, so we have the same configuration) and, same problem, but my friend's configuration is run !!

Thanks for your help (i've do what i can for my english)

Have a nice day