Problem creating connection to DB

Question

I get the following error :      "Test failed: IO Error: The Network Adapter could not establish the connection"
Database version: 12g
Application Name:     jdeveloper 12
Description :
                    while creating connection in jdeveloper with the database 12g  , under the schema name 'HR' ,  to whome i m connecting successfully while using 'sqlplus' , i encountered the above stated error.
From : Oracle User

Answer 1

Thanks for that. That actually worked (well in a roundabout
sort of way). I'll explain: It turns out that the initial
connection string that I was using also works as well!! This was:
Provider=sqloledb;Data Source=[MACHIINE NAME];Initial
Catalog=[ANY EXISTING DB NAME];Uid=[ENTERPRISE MANAGER
LOGIN];Pwd=[ENTERPRISE MANAGER LOGIN PWD];
HOWEVER after doing a bit of further investigation, I
discovered that Dreamweaver didn't like my PASSWORD!! I'm reluctant
to say this is a bug before someone else can verify this for me.
Basically, Dreamweaver doesn't like the substring "$$" in the
password!! A single "$" is fine, but not "$$" !!! I've not tested
it with other (sub)strings so I'm not sure how "widespread" this
problem might be. I admit it would be a rather obscure bug to
uncover but, pretty significant I believe.
The fact that passwords of this nature work fine in SQL
Server/ Enterprise Manager would lead me to conclude that this is
not a problem with SQL Server 2000.
If you could give that a quick check and let us know that'd
be really good.
Thanks...