error when connect to sqlserver from another machine

hi ..

i install sqlserver and make app with vb6 using ADO to connect to the database and successfully

i put that application on another pc on the network
when i open it it says "can't login computername\guest" ?!!

any help

thanks in advance.any answers|||Are both of your pcs on a domain or a workgroup? If it's not domain, you need to create a same account/password pair on both machines and use that account to login.|||thanks

Xinwei Hong for reply

the two machines on a workgroup so .. could you explain pcs under domain in few lines ?
now i will create two users on the two machines and tell you later

thanks in advance.
|||By "pcs under domain", I mean whether your PC is under a domain which is usually used in median/large company. In this case, domain controller will help you do a lot of things.|||thanks for reply

you says i can do a lot of things if i'm under domain like what ?and what is the domain controler ? could you explain ?

and if you have short time i can talk to you in messanger it will be kind from you

thanks|||i make 2 users with same name but ..
the same problem occurs ?|||It's hard to describe "domain controller" and related stuff in short words. I recommend you find some documents related to Windows Networks to read.

Are you sure your client is running under the user account you created and you used that account to login to the server? It means you may need to login the client Windows system and run your client app under that account. If you user Administrator or even logon the computer without a user/password, it won't work.|||is this means that i need a password for administrator user to login to the database server ?|||Not necessary. SQL server runs as a service under various account(e.g. network service, local system, administrator account, etc.).