after upgrading from PHP5.2.6 to php 5.3. it seams, I also have to reinstall the PHP memcache-module. So I downloaded the newest version of memcache (3.0.6) and followed this do
PECL modules are (by default, and most of the time) downloaded from a non-local repository. Therefore you will need some form of internet connection to download it.
Alternatively you can upload the pecl package from your machine to a location on the servers local file system and install it from there, or compile from source.