here is a example my server ip is 173.201.93.1 to check if the domain has updated to the correct DNS server u can run command prompt and type
ping yourdomain.com and hit enter ..
my sever is is 173.201.93.1 u can find it on the godaddy c panel like in the pic below..
my domain is glitterdent.com
it pings to the correct IP that means it works fine..
do this and see if ur domain gets resolved to ur server ip..
usually SLT DNS server take a time to Refresh...