Drop out from # 2 to nothing

[freerecycling]

we had a lot of top position in Google, one was "ink cartridge recycling" we had for month #2, now we are complet droped out. I see also a lot of other key phrases we are not any more in. What is the problem?
I'm redirecting a very old domain: http://www.service4u.com to a newer one, 1 year old to http://www.freerecycling.com.
Is this a problem? Also I saw that we have to listings under both domains.
I have also a lot of incomming links from http://www.service4u.com and some from http://www.freerecycling.com.
How can I combined now and make http://www.freerecycling.com the main domain. The IP is pointing for http://wwww.service4u.com to http://www.freerecycling.com.

Hope some one can help me.

Thank you

[greeneagle]

Check out
http://www.scroogle.org
I did a quick search on "ink cartridge" and here is what I found:

Hit list terms that contain your substring:
85 epson ink cartridges
84 ink cartridges
78 printer ink cartridges

average casualty rate: 82.3

Blame the spammers!

Better scramble to change things or join GOOGLE Adwords! Looks like pay per click time.

Hope this helps.
Ken Webster