Microsoft SqlServer Desktop Engine Connection Problem

i installed the MSDE2000A on server and i tried to connect from client machine through vb Application using connection string. Server anad client are in LAN. but Some systems able to connect and some systems are unable to connect.

i am getting the error:

"SqlServer does not exist or access denied "

for non connected machines.

the server is listening from these machines. but not connecting to MSDE.

can anyone give me solution what may be the cause.Ensure the System DSN used and login must have required privileges to connect to SQL server.

What is the authentication mode used?

Try:
1. Make sure the SQL server is on
2. Ping the server machine
3. Try connecting to the IP address rather than the server name

Review information from this KBA (http://support.microsoft.com/default.aspx?scid=kb;en-us;328306) for potential causes and resolve it.|||i am using user authentication mode.
i have set DISABLENETWORKPROTOCOLS=0
i have done pinging through IP Address.
i am able ping database.
after doing all these test .. still getting same error...

is there any other possibilities....

Originally posted by Satya
Ensure the System DSN used and login must have required privileges to connect to SQL server.

What is the authentication mode used?

Try:
1. Make sure the SQL server is on
2. Ping the server machine
3. Try connecting to the IP address rather than the server name

Review information from this KBA (http://support.microsoft.com/default.aspx?scid=kb;en-us;328306) for potential causes and resolve it.|||Review points listed in the knowledgebase article.

i am using user authentication mode.
SQL Server does have only 2 modes - Windows only or mixed. Which on e is yours?

i have set DISABLENETWORKPROTOCOLS=0
Don't know about this protocol in SQL, it should be named-pipes, TCP/ip or Multi-protocol. From Start--> programs --> goto MSSQLServer program group and select Server network utility and check for enabled protocols.
i am able ping database.
How can you do that in SQL?|||mine is MIXEDMODE.

this is obtained by setting parameter SECURITYMODE=SQL

i am sorry to tell u that i ping to database.

not database... it is server.

i am able to ping to server where i installed MSDE.

Originally posted by Satya
Review points listed in the knowledgebase article.

SQL Server does have only 2 modes - Windows only or mixed. Which on e is yours?

Don't know about this protocol in SQL, it should be named-pipes, TCP/ip or Multi-protocol. From Start--> programs --> goto MSSQLServer program group and select Server network utility and check for enabled protocols.

How can you do that in SQL?|||I'm probably being silly, but could you have installed SQL as a named server and tried to access it as a default (unnamed) server?

-PatP|||Check for any h/w issues on server installed by referring to event viewer log.