Sohail, Maybe the Thawte root certs on the client need updated ( http://www.thawte.com/roots/). Check to see which root cert and/or intermediary cert your cert uses and make sure they're installed on the broken clients. Tony "Sohail Qadir" <qadir.sohail@xxxxxxxxx> Sent by: thin-bounce@xxxxxxxxxxxxx 06/19/2008 01:48 PM Please respond to thin@xxxxxxxxxxxxx To thin@xxxxxxxxxxxxx cc Subject [THIN] ssl error 61 when launching application from Citrix Hi Guys, Can some one help me with this because I am stumped on this one. I have two citrix presentation servers installed and they load balance all the apps with a web interface and secure gateway installed on a third server which sits in the DMZ. Yesterday my certificate expired on the secure gateway and I installed a new certificate from thawte and tested okay but some users complained that they were getting ssl error 61: You have not chosen to trust, the certificate. If I log in the same user on a different pc she logs in fine and can launch all the applications. I have upgraded her citrix client to the latest one with no luck. Any suggestions will be greatly appreciated. Regards Sohail Qadir CONFIDENTIALITY NOTICE: This message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message.