server does not exist

Hi to all

I'm developing a multiuser application in vb 6.0 using Sql Server 2000. Follwing is the connection string i've used

Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=OrderProcess;Data Source=ISHA-0342D16385

this gives me an error message Sql server does not exist. Access denied.
I tried various other things instead the server name like
I tried IP address and port number.
I obtained IP addreess by typing ipconfig at command prompt
I used network library = DBMSSOCN as an additional parameter
None of the above things worked.
I'm badly stuck here. Pls. take me out from this. It's very urgent.

Thanking u all in advance.

The connectionstring is incorrect or you do not have permissions to access it. Check out http://connectionstrings.com and make sure your windows username has the appropriate permissions to logon and access the server.