Make sure you are updated to version 2.21 then update the Intel drivers from our website from link below in the iSCSI-R3 Enterprise section for [2007-07-16]
iSCSI-R3 Enterprise update ver. 2.21 build 2753.
When making changes to the Intel driver go to CTRL ALT T for Console Tools then select option 6 "Modify driver options", here is where you can change settings.