Removing PEAR Shared Host Installation

I installed PEAR on a shared host while trying out a
database program called PHPFIN.  I now want to REMOVE Pear
completely because I don't need it, but when I try to delete
the files using FTP I get "PERMISSION DENIED".

I have searched though numerous forums and FAQ lists and I
cannot find the answer I need!

What is the process required to completely remove PEAR and
ALL the remaining files from my shared host?