[Qgis-user] public key for debian 7.2 doesn't work

[matteo]

Hi guys,
trying to install qgis 2 on debian with the deb http://qgis.org/debian 
wheezy main repository but there are some problem with the public key:

ma7730 at debian:~$ gpg --recv-key 47765B75
gpg: requesting key 47765B75 from hkp server keys.gnupg.net
?: keys.gnupg.net: Host not found
gpgkeys: HTTP fetch error 7: couldn't connect: No such file or directory

Some ideas or solution?

Thanks

Matteo