owner of a sony bdp-s300.

[early adopter]

Hello there.I am a new member of this forum and have had a hi-def player and tv for 2 years now.I am slowly building a bd collection and recently have discovered that the first bd I've bought doesn't work anymore(can't play disc).Casino Royale (not the collector's edition but the first version) worked perfectly before firmware update 4.5 and was one of the best pictures of the 24 films on bd that I own.I installed the new 4.9 firmware and not noticing any difference(yet!) casino royale still can't play.Now I was going to buy a new player anyway as I have a 7.1 system and since the s300 does not decode dts hd master audio,I intend to buy a player that does.Does anyone here have the same problem-"can't play disc" and is there a solution please?