Giri, This is expected behaviour, User1 (connected to machine1) has to login again after Services on Node 1 are down as session are not maintained across servers. Here is test case ---------------------------- User1 connected to machine1 & he can access application Shutdown services on machine1 now, you will see forms disconnected for User1 Now open new browser , Clear cache(from user local browser) & then try to connect again , this time user1 will be redirected to node2 . If you still see class not found issue , try clearing jcache (Jinitiator cache on local PC of user1) & access again. Try this & let us know .. If you still hit issue after clearing IE cache & jinit cache "This might be related to digital certificate issue for signed jar files on two servers" Regards Atul Kumar http://becomeAppsDBA.blogspot.com <- Online Diary of Apps DBA, Apps Certification venkata giri ginjupalli <vginjupalli@xxxxxxxxx> wrote: Atul, Yes, this happens when the connection switches from machine a to machine b. Also confirm if two users User1 connected to server1(forms) & user2 connected to server2 (forms) can access forms services without any issues or not .. Yes, this is true as long is that machine is up and running. Thanks Giri On 12/18/06, Atul Kumar < atul_iiit@xxxxxxxxx> wrote: Giri, As per my understanding from below communication Issue happens when forms conection switches from Machine A (working fine as long as you are connected to A ) to Machine B (Users who were connected to Instance B forms initially can access Instance B without Issues ). Please confirm if this is true Also confirm if two users User1 connected to server1(forms) & user2 connected to server2 (forms) can access forms services without any issues or not .. Atul http://becomeAppsDBA.blogspot.com <- Learn Apps DBA or 10g AS including OID, SSO, Apex Atul Kumar Site Dedicated to Apps DBA's Forum Dedicated to Apps DBA's