I'm starting to see my BU-353 using IG4 doesn't pick up the sats like it used to when i first got it. I've only had it for what, maybe 4 or 5 months. Don't know if these things go bad or what. Haven't moved it from its location.
goto prolific's website
the driver that comes with the bu-353 and their site is 2004 version, the one on prolific's site is 2007. i also couldnt get out of S3 with the 2004 driver till i went to version 2007.
good luck.
Tony