BB Curve :: It Won't Turn On And Flashing Red Light

Okay so my blackberry curve 3G is relatively new, around 10 months. And today it was working fine, decent charge on the battery, when it decided to crash. I left it alone, and it still wouldnt respond. So i took the battery out, left it for 5 minutes, and put it back in. Usually, it automatically starts up, but this time there was no response. When i tried to turn it on, the screen stayed black, but the light in the corner came on red, for roughly 10 seconds, then turned off, and began to flash for around 3 seconds, every 10 seconds. ive tried plugging it into the computer, however it cannot pick it up, and if i try to install older software (downgrade it, which it recommends to do) it fails just before the end, every time.