CF error: The listener could not find any available service handlers...?

["rpeters1983" <webforumsuser@xxxxxxxxxxxxxx>]

I'm running Coldfusion 8 and Oracle XE 10, both on IIS 7. Every so often, I get 
this message:

 [Macromedia][Oracle JDBC Driver][Oracle]ORA-12519 The listener could not find 
any available service handlers that are appropriate for the client connection. 
One possible cause for this error is that the server was not configured for the 
specified server type (shared/dedicated).

 I can restart the OracleServiceXE service and it works fine. However, I have 
no clue what is causing this. I believe it all began once I started using 
CFSCRIPTS and running queries using that instead of CFML. Would anyone know 
what COULD cause this error to happen and what I should look out for? I am new 
to Oracle and CF btw. 

 Also, I can access it fine through the oracle homepage, but when I attempt to 
connect to it from the coldfusion administrator, it cannot establish a 
connection to that data source. It is only after I restart the service that 
things go back to normal. Thanks.

 Ryan