Quotemodule folder have bad descriptors
I mean, first change the chmod settings, then install, the newly installed files should get the new settings
Other option is using a web based file-explorer
The thing is, wb installs trhe files as the webserver user, mostly apache, nobody or www.user or simular.
You as user don't have the rights apache has so you can't do anything with the apache made files
3 options basicly:
1 - try making files with more rights (less secure btw)
2 - try chmodding with your ftp client so you got the needed rights
3 - use something wich runs under webuser (look at the template edit for example)
When you enhance the rights, don't forget you inherit the folder rights as well, try setting those to 777
Good luck,
John