Hard time connecting to Oracle database from Visual Web Developer 2005

[antonyliu2002]

I am having a hard time connecting to an oracle database from within
Visual Web Developer (VWD) 2005 Express Edition.

Check out the screen snap shot here:

http://static.flickr.com/97/241874792_aebbadac2b_o.gif

Here is the situation:

1. The oracle database runs on Machine A.
2. The IIS 6.0 Web server runs on Machine B.
3. I am developing a web-based reporting service on Machine C.

I can access the oracle database with no problem at all either from
Machine A under SQL*Plus or from Machine C in my VB or C# code using
the ODBC connection string.

But I just cannot connect to it from VWD by either selecting Microsoft
ODBC Data Source or Oracle Database.

I would like to use the MS SQL 2005 Reporting Services for my Web
application.

Any idea on how to shoot this problem?

Thanks.