Sounds missing in Minecraft 1.5.2. Server returns 403 error.

So, for the good old times, I wanted to play some minecraft 1.5.2. However, as soon as I started clicking any button, I found out that there was no sound. My log (see attachment) shows a LOT of 403 response on the download of music and sounds. This led me to believe that there is something wrong with the server that the music and sounds are downloaded from.

Now, you might be saying "Why not play a newer version of minecraft then?"
My response to that is "Why offer older minecraft versions that miss their sounds?"

So, could you pretty please fix this?