Update software is shown as unavailable

Hi guys,
After a long time period, Rogers Wireless has finally published the upgrade for Android 2.1 for Sony Ericsson Xperia X10 phones. The update was available from last night but unavailable from this morning.
But I stumped with a problem: it asked that I use the Sony Ericsson PC Companion software to upgrade, but I kept on getting an error.
So can anyone suggest me? Thanks in advance.

Sony Ericsson PC Companion
Installation Error
Unable to install or start phone software update components
