If it works via IP address and not the host name then your issue is most likely a network issue.
If you do a "ping <hostname>" do you get the same IP address? Check with your IT group for help with this.
Data Management Support Specialist
is there a step by step guide for reinstalling the IIS?
I have the same problem after installing sp2 for Vault Pro 2012.
The IIS roles are configured corectly, so I must reinstall the iis.