I redownloaded the game from the Main Mirror on the website.When i DLed it it came with these files (Try to see if anything is missing).
A: All the .plr files. sonic.plr,tails.plr,and knux.plr
B:music.dta,zones.dta,soar.dta and drill.dta
C:the srb2.srb,and the srb2win.exe itself,plus the Srb2Src...