Update firmware failed

I’m using the Sansa Express 2.0GB w/version 1.01.05

I would like to update it to the latest version, 1.01.12

I had installed the Sansa updater to upgrade the firmware

It can downloaded the firmware but it can’t install onto my Sansa Express.

It said “the installatin failed. Please try again later”

Can anyone give advise to my question, thanks a lot.