Cant install the google maps plugin

Hi There. trying to install Google maps for the event+ plugin.

Nothing seems to work:

INSTALLING DIRECTLY:
If I install directly from your website to my website admin area, I get:
"Could not create directory. .../public_html/wp-content/upgrade/wdp-un.tmp"

DOWNLOAD UNZIP:
I download the plugin, unzio and FTP across, I just get failed transfers

DOWNLOAD and UPLOAD ZIP via Add New plugin in my admin area:
I get "The uploaded file could not be moved to wp-content/uploads/2013/10."

What do I need to do?

Regards
William