cgminer error "No servers could be used! Exiting"

Hi,

I hope I'm not reposting a question. I'm trying to run cgminer version 2.2.0 with only cpu mining enabled. I just want to generate some namecoins.

I invoke the command as follows:

./cgminer -o http://api.bitcoin.cz:8332 -u xxx.yyy -p zzz --syslog --donation 0.5

The username and password are as displayed by the mining pool. However, I'm not able to get access to the pool. The syslog output is:

Code:

Jan 29 21:39:24 Desktop cgminer: Started cgminer 2.2.0
Jan 29 21:39:24 Desktop cgminer[10849]: Testing pool http://api.bitcoin.cz:8332
Jan 29 21:39:24 Desktop cgminer[10849]: HTTP request failed: couldn't connect to host
Jan 29 21:39:24 Desktop cgminer[10849]: Pool 0 slow/down or URL or credentials invalid
Jan 29 21:39:24 Desktop cgminer[10849]: Unable to get work from pool 0 http://api.bitcoin.cz:8332
Jan 29 21:39:24 Desktop cgminer[10849]: Pool: 0 URL: http://api.bitcoin.cz:8332 User: xxx.yyy Password: zzz

Couple of things to note are:

I've had the same problem with cgminer version 2.1.2
The older version (2.1.2) once worked successfully (about 16 or so hours) with a different mining pool. Since then it was unsuccessful.

I'm not sure if I'm missing anything. Let me know if you need more details.

Thanks.
d