This should not be necessary; you need to follow the two steps on the eid.belgium.be website:

- Install eid-archive.deb, which *enables the repositories* but does not install the eID software yet.
- Then, run "apt-get update" and "apt-get install eid-mw eid-viewer". This installs the eID software from the repositories, and will ensure that the updates are installed.

If you don't do the last step, then you haven't installed the eID software and it's no surprise that things won't work. You can install the software from eid-mw.tar.gz, but that doesn't buy you much that properly installing the packages from the repositories does, and it's a lot more manual work for little benefit (as well as not giving you proper updates)...