Since Windows 7 is not a supported OS for this machine, that may explain why your updates aren't "taking".  Here is what I would do: SBUU (Systems Build and Update Utility) - boot to this DVD first, select Update Firmware:   SUU (Server Update Utility) - insert this DVD when prompted above for the repository - when downloading, make sure to follow instructions carefully found on each DVD ISO image's download page):   This will update all your system firmware (recommended) - not just your BIOS firmware.
I was attempting to update my BIOS on my T310 from 1.0.2 to something newer. When I booted from Windows7 to a DOS prompt. I was able to run the executables I downloaded. They seemed to be working fine until the dialogue box at the end for a reboot.The system just goes off and never comes back.Tried a few versions 1.1.2, 1.3.6, 1.6.4. Same result.
T310 BIOS update