HELP (Word Clock Widget)

Hello,
I´m building my site, speakspanishonskype.com. I decided to try the World Clock Widget, then this showed up (below). Now I can´t enter my WP admin or Wp-login to eliminate this plug in and set things back to the way they were before. Does anyone know the answer to my problem? I´m new to WordPress, so your help is GREATLY appreciated. Thank you.

Warning: DOMDocument::load() [domdocument.load]: URL file-access is disabled in the server configuration in /homepages/4/d369480493/htdocs/app369480506/wp-content/plugins/world-clock-widget/worldclock.php on line 49

Warning: DOMDocument::load(http://speakspanishonskype.com/wp-content/plugins/world-clock-widget/worldclock.xml) [domdocument.load]: failed to open stream: no suitable wrapper could be found in /homepages/4/d369480493/htdocs/app369480506/wp-content/plugins/world-clock-widget/worldclock.php on line 49

Warning: DOMDocument::load() [domdocument.load]: I/O warning : failed to load external entity “http://speakspanishonskype.com/wp-content/plugins/world-clock-widget/worldclock.xml” in /homepages/4/d369480493/htdocs/app369480506/wp-content/plugins/world-clock-widget/worldclock.php on line 49

Warning: session_start() [function.session-start]: Cannot send session cookie – headers already sent by (output started at /homepages/4/d369480493/htdocs/app369480506/wp-content/plugins/world-clock-widget/worldclock.php:49) in /homepages/4/d369480493/htdocs/app369480506/wp-content/plugins/si-contact-form/si-contact-form.php on line 1410

Warning: session_start() [function.session-start]: Cannot send session cache limiter – headers already sent (output started at /homepages/4/d369480493/htdocs/app369480506/wp-content/plugins/world-clock-widget/worldclock.php:49) in /homepages/4/d369480493/htdocs/app369480506/wp-content/plugins/si-contact-form/si-contact-form.php on line 1410