Whenever I try to establish connection with DB2 UDB database in .Net 2.0, it is taking 1-2 mins to open the connection. I'm using DB2Connecton in C# for this purpose.

sConnectionString_DB2 = "Server=DB2ServerName:PORT;Database=DATABASENAME;U ID=USERNAME;PWD=PASSWORD;";

if (objDB2Con.State == ConnectionState.Closed)
{
objDB2Con.ConnectionString = sConnectionString_DB2;
objDB2Con.Open();
}

could be database is getting activated or what is ur log file size if its huge then will take time to create primary set of logs, you can activated db before you connect thru ur application.

regds
Paul

IF I try to connect DB2 with ODBC Connector, it is working fine. It connects within seconds.

it might be - someone is already connected
check if db is active (see infocenter for details)
check that both try to connect on activated db and see the difference
pd/psi is good/helpfull for you..

I'm the only person who is connecting this DB and it is very much active