problem with beryl, and installing

[porsher_puddles]

i get this message whenever i try and install through the mandriva control centre.
packages have bad signitures, invalid signiture, nokey, do you want to install, i say yes and it installs ok.

problem number 2 is i installed beryl and i can rotate my desktop but it just has one screen with beryl flash screen and all the other desktops are white. i think something is wrong with my videocard install or config, i have a nvidia 7200, amd dual core system, any way to work this out.

this is what i keep getting
[root@localhost charles]# urpmi beryl-manager
To satisfy dependencies, the following packages are going to be installed:
beryl-manager-0.1.4-1mdv2007.0.x86_64
xlsclients-1.0.1-3mdv2007.0.x86_64
xvinfo-1.0.1-3mdv2007.0.x86_64
Proceed with the installation of the 3 packages? (0 MB) (Y/n) y

ftp://mdk.linux.org.tw/pub/mandrakel...7.0.x86_64.rpm
ftp://mdk.linux.org.tw/pub/mandrakel...7.0.x86_64.rpm
...retrieving failed: curl: (19) Given file does not exist

...retrieving failed: curl: (19) Given file does not exist
...retrieving failed: curl failed: exited with 19 or signal 0

warning: /var/cache/urpmi/rpms/beryl-manager-0.1.4-1mdv2007.0.x86_64.rpm: Header V3 DSA signature: NOKEY, key ID 26752624
The following packages have bad signatures:
/var/cache/urpmi/rpms/beryl-manager-0.1.4-1mdv2007.0.x86_64.rpm: Invalid signature (NOT OK (no key): /var/cache/urpmi/rpms/beryl-manager-0.1.4-1mdv2007.0.x86_64.rpm: Header V3 DSA signature: NOKEY, key ID 26752624)
Do you want to continue installation ? (y/N)

[jnike]

Hi porsher_puddles,

I am fairly new to all this, but I would suggest you give compiz a go, which is bundled in the mandriva 2007 free, which I assume you are using.

The MCC, Mandriva Control Centre, is quiet useful for checking for packages currently installed & associated packages which may be needed or for configuring the 3D desktop eye candy.

I hope you find this useful

Jnike