[PluginSimple Dropbox Upload Form] Errors can't seem to fix

Hi all,
Been working with WP for a couple years and can’t seem to figure this one out… installed properly and went to utilize and am getting following error when I try to upload.

Warning: include() [function.include]: URL file-access is disabled in the server configuration in /home/evolvel1/public_html/wp-content/plugins/simple-dropbox-upload-form/inc/Dropbox/OAuth/PEAR.php on line 47

Warning: include(HTTP/OAuth/Consumer.php) [function.include]: failed to open stream: no suitable wrapper could be found in /home/evolvel1/public_html/wp-content/plugins/simple-dropbox-upload-form/inc/Dropbox/OAuth/PEAR.php on line 47

Warning: include() [function.include]: Failed opening ‘http://evolvelinguistics.com/wp-content/plugins/simple-dropbox-upload-form/inc/Dropbox/pear_includes/HTTP/OAuth/Consumer.php’ for inclusion (include_path=’.:/usr/lib/php:/usr/local/lib/php’) in /home/evolvel1/public_html/wp-content/plugins/simple-dropbox-upload-form/inc/Dropbox/OAuth/PEAR.php on line 47
Error: The HTTP_OAuth_Consumer class could not be found! Did you install the pear HTTP_OAUTH class?
Fatal error: Call to a member function putFile() on a non-object in /home/evolvel1/public_html/wp-content/plugins/simple-dropbox-upload-form/wp-dropbox.php on line 210

any guidance would be appreciated!