Please Help: How to Hire an IT Admin?

(x-posted here. *Reply-to* set to netscape.public.mozilla.jobs)

Hi:

I need some advice: The company I work for (environmental consulting in
Germany) is *looking to hire* a second IT administrator who will keep
our network running and help our ~150 (non-IT) engineers when they have
problems.

We have placed an online ad, but have received very limited response.
Here's our ad:
http://stepstone.de/offers/offer_detail.cfm?click=yes&id=260297

1. Are we doing something wrong? What?

2. Should we include what benefits we offer?

3. Do qualified persons not want IT admin jobs?

4. What minimum salary and/or benefits should we be offering?

Please give me a realistic response, and not some "dream" conditions.

Thanks for any help you can provide.

PS. You can answer in German, if you like. :-)

PPS. x-posted because I suspect n.p.m.jobs might be (nearly) dead. 
Anyhow, I set a follow-up to "jobs", so I'm hopefully forgiven.

-- 
Peter Lairo