We provide clientless SSL VPN access to a network by using CSD and a Citrix farm on the back end. It works great with XP clients. However, with 32-bit Vista, it is hit or miss. Untrusted Vista machines, which are forced to fully load CSD, often report CSD already running, please disconnect/delete, but even when going through with the disconnect/delete, the user faces the same error upon next connection. We've made sure they only have a single (new) version of Java greater than 1.6 update 13. We've had the user clear the IE and/or Mozilla (if using Mozilla) cache, clear the java cache and reduces its size. Disable their personnel firewall while attempting the connection and still we get this error. I appreciate any constructive feedback.
I have this problem too.