RootExplorer help

[MafiaJoe]

Im trying to install some drop down menus for my d2, downloading the file into AndroidThemes file is no problem, but when I try to copy it into system/app folder, it says that it is read only and I cant paste there. Also, at the top it says that it is set to r/o (read only), so I go to tap Mount R/W it wont let me do it... any other way to change it to Read/WRite that I am missing? thank you.

edit:
Reinstalled app, seems to be working now