All, One of our clients are using an SBS2k server with ISA installed. They want to use third party banking software which uses V-One Smartpass for security. TCP port 3845 needs to be opened on the firewall for this. I've installed the software and opened the port (I'm sure it's open?!), when you first want to register the website form opens fine, but when you click on register it wants to open 127.0.0.1 (which is the localhost) !!! Any ideas what causes this problem, is it the firewall or the software? On ISA I've created a protocol definition, primary outbound and secondary inbound, I've created protocol rules and ip packet filters, but it's just not working. Any help would be greatly appreciated. Geert