could not connect with database on remote machine.

Hi,

I have websphere studio 5 with test envoirment 4.
I want to access database on remote machine but getting the following error:

javax.naming.NameNotFoundException: jdbc/dbtest

In my web.xml file I had defined:

<context-param>
  <param-name>datasource</param-name>
  <param-value>dbtest</param-value>
  <description>for testing</description>
  </context-param>
 <context-param>
  <param-name>ISUSER</param-name>
  <param-value>testuser</param-value>
  <description>login id</description>
  </context-param>
 <context-param>
  <param-name>ISPWD</param-name>
  <param-value>testpwd</param-value>
  <description>password to login</description>
  </context-param>
 <context-param>
  <param-name>ISHOST</param-name>
  <param-value>testMachine</param-value>
  <description>db machine name</description>
  </context-param>


I tried to search on web, it looks that I need to data source created on my machine.

Please somebody answer the following things.
0) Do I need the data source?
1) I have no admin console, so do I need to admin console to create data source.
2) Do I need to install admin console separately or websphre studio 5 installation itself contain the admin console.
3) How to run admin console.

If data source is no needed then what is solution to get rid of above error and connect with the database.