ODBC DNS not in list for Crystal Reports Server 2008 install

I am trying to install Crystal Reports Server 2008 V1 with SQL Server 2008 on Windows Server 2008. When the install gets to the CMS database information, it asks for the ODBC DNS information. Even though I have created both a user and a system DNS for SQL Server, they don't show in the list. Any suggestions would be appreciated.

Thanks,

Curt