phat1000

I am looking for some advice. I had 6.20 TN-D in my Phat 1000 for a long time(over 1yr) and had been working great with all ISO & CSO games. It suddenly stop loading the ISO games in the PSP. Game ICON not showing up. Should I upgrade OFW to 6.35 and install one of the 6.35 CFW? One other...