I find above error when i tried to run applications i just installed; efilemanager and multimedia player. Can any1 help?

uninstall one of two apps... then try..... otherwise uninstall both .. and
install it again.....

if still cannot format your mmc card first b4 u format your phone

Hello guys!

After installing the programs, try restarting the phone. If this does not help, just reset the phone. No need to worry. The programs installed will still be intact. =)

If any further error occurs try to format ur phone by pressing *#7370# but before u do this, be sure to backup ur contacts and any other important infos!