Blog not autenticated

I installed Multisite Analytics plugin on my WPMU blog and configured using valid UA number. Unfortunately Google couldn't autenticate my blog. I checked script generated by plugin and on Google Analytics page. The difference is in domain name.
_gaq.push(['_setDomainName', 'domain.com']);
and
_gaq.push(['_setDomainName', '.domain.com']);
Plugin generates additional "dot".
I don't know, it's correct or not (I'm not programmer) but maybe this causes my problem.