Can't delete skins files N97

[Dito]

Hello

I formatted my N97 and phone installed themes and apps itself. But when i enter application manager to uninstall themes i can't find these themes i installed before formatting.
I tried to delete skins files from x-plore but i got this message

Cannot delete file:
E:\resource\skins\foldername\themepackage.mbm

please help me how to delete old themes.
Thanks

[rayraves]

I must tell you that you need to take help from the computer if your file is not deleting. So, explore files in computer than delete skin frames from there one by one. You might be easily do this process from computer.

[RTGDJF]

Very thank you for your message, look forward to your update again