Some Error messages with possible solution in asp-pages

HTTP 500.100 - Internal Server Error - ASP error
Internet Information Services

Error:
Microsoft OLE DB Provider for ODBC Drivers (0x80004005)
[Microsoft][ODBC driver for Oracle][Oracle]ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
Solution:
You have mistyped your your database name. Check from tnsnames.ora it exists and is working. Check you can connect to database with SQLPlus.

HTTP 500.100 - Internal Server Error - ASP error
Internet Information Services

Error:
Microsoft OLE DB Provider for ODBC Drivers (0x80004005)
Unspecified error
/website/some.asp, line 13
Solution:
Your database is not running. Start your database. Check you can connect to database with SQLPlus.