I already cleared everything in workingdb folder, still cant play dynasty, playoffs and season.=( I opened schedulepreseason.dbf in DB commander, the file is blank.
There's one posted in the Patching Help & Requests section. You don't need it to fix the problem though, I was just asking if you had one to establish whether a modified database was causing some problems.
I'd try clearing the workingdb and currentdb folders again, then copy the original databases from the NBA Live 08 disc to your originaldb folder and try again.