vCloud Director 5.1 Branding - overwritten after reboot

Hi guys

I have a question and hope a person can help me.

In our Company, we branded the vCloud loginpage for our customers.

I have edit the template with this tutorial

http://blogs.vmware.com/vcloud/2013/02/customize-vcloud-director-5-1-login-style-and-logo.html

and it works fine.

I have change the VMware logo with the logo from our company.

And i delete the bluebox and change it with a design from our company.

But now, if we reboot/start vCloud directory new, the logo and bluebox are overwritten

and we have only the configuration from the css.

example:

BildUpload Bilder Fotos Upload gratis kostenlos hochladen

My questionis:
How can wesolve the problem?

after a reboot,I wantourfiles...

thank you and best regards

Alex