.net - Database Connection in VB.NET Windows Forms -

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i have problem connecting server machine. when try connecting machine following code, works fine: 

'connstring = "data source = .\sqlexpress;" & _   '"initial catalog = one;" & _   '"integrated security = sspi"    try     conn = new sqlconnection(connstring)     conn.open()     messagebox.show("connection successful")   catch ex exception     messagebox.show(ex.message)   end try

but when try connected machine sql server 2000 installed, timeout message. code follows: 

connstring = "server = xxx.xxx.xxx.xxx;" & _       "initial catalog = one;user id=xxxx; password=xxxxx;" & _       "integrated security = sspi"        try         conn = new sqlconnection(connstring)         conn.open()         messagebox.show("connection successful")       catch ex exception         messagebox.show(ex.message)       end try

can please me on issue?

imports system.io imports system.data.sqlclient public class supplier     dim scon new sqlconnection  //you write code in load event  private sub supplier_load(byval sender system.object, byval e system.eventargs) handles mybase.load         scon = new sqlconnection("your connection string")         scon.open()     end sub   endclass

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