Firmware failure

My Ubiquiti Nanostation will not accept the new firmware.  I went to the administration page, and downloaded the latest firmware.  When it's done it I get an error msy saying it's not the correct version.  My hardware is: Ubiquiti Nanostation (ubnt(nanostation-m-xw).  The administration page lists my current firmware as version 3.22.8.0 when I chose the firmware listed on the download page it says it's nanostation-m-xw-squashfs-sysupgrade.bin.  After I chose that, it appears that it starts the install, but always fails with "incorrect version".  

Leonard/WV3P