Oracle Database Discussions

Hi,
I have installed weblogic, and oracle. installed my application. but when I am trying to open my applicaion at http://localhost:8050/Buyer/
it is giving me error:

Error 503--Service Unavailable

From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:
10.5.4 503 Service Unavailable
The server is currently unable to handle the request due to a temporary overloading or maintenance of the server. The implication is that this is a temporary condition which will be alleviated after some delay. If known, the length of the delay may be indicated in a Retry-After header. If no Retry-After is given, the client SHOULD handle the response as it would for a 500 response.
Note: The existence of the 503 status code does not imply that a server must use it when becoming overloaded. Some servers may wish to simply refuse the connection.

Can you please tell me, where i can find out the solution for the same.

Thanks
Arun