I just added a 6757 to my D-Link system and it works nicely. However in the Response Point administrator I see it says the firmware is out of date. My system is on SP2 and this was done a while back. How do I get the firmware for this phone? I went to the Aastra site and found a file to download but it unzipped to a readme and a file 57i.CT.st. I am at a dead end. What next. Thanks in advance for any help.