gsmsikar, If your player is working with no problems on the firmware you have used then there is no need to change it.
If your player has shown a decrease in memory it is possibly because your player had a hacked memory chip and flashing or formating has removed the hack and know your player is showing it's true size which I suspect is really a 256MB chip.
To confirm this check the serial number of your memory chip with this list of Samsung and Hynix chips
http://www.mympxplayer.org/samsung-a...rs-vt1692.html