Hi Please shed light on the following: I have a client behind ISA Server trying to establish connection to business online banking. The message comes up saying "Error occured while communicating to server. Header error [-1 null]". I have called the bank in question and was advised to change the settings on Port 443 and 80 must be increased and set to not go above 200 milliseconds. I am not being advised where exactly to make these changes Please help...