I cannot install the Client Software on a Vodafone VDA V (I believe it is a HTC 710)
I can login to the GMS Homepage and select Download Software. The download starts then I have to type in server name, user and password. The download starts again and after a long long time the installation starts.

Some screens later I get the message:

Installation of failed

Invalid header signature for package

I am shure that the software package on the server is ok, because I have installed the software many times on other Windows mobile devices (another types). There is enough space on the device.

Any ideas?