Google Checkout Button not working

Hi All,
I am trying to set up my payments with Google Checkout... I've created the button and my page I went to test it and click on the Google Checkout button and it all it does is redirect me to my home page. Not what I want.
Does anyone have any ideas of what might be causing this and if you have have any suggestions?
Strangely, I am also given an error code I've not seen before when this happens: Warning: urlencode() expects parameter 1 to be string, array given in /home/content/86/7052586/html/wp-content/plugins/geo-mashup/geo-mashup.php on line 386
This is the Google Geo Mashup plugin that I'm using (which is still working fine). As a test I deactivated it. I was still redirected to the homepage but the error message obviously wasn't there.
I look forward to hearing back from someone. Thanks!
Brett
I am trying to set up my payments with Google Checkout... I've created the button and my page I went to test it and click on the Google Checkout button and it all it does is redirect me to my home page. Not what I want.
Does anyone have any ideas of what might be causing this and if you have have any suggestions?
Strangely, I am also given an error code I've not seen before when this happens: Warning: urlencode() expects parameter 1 to be string, array given in /home/content/86/7052586/html/wp-content/plugins/geo-mashup/geo-mashup.php on line 386
This is the Google Geo Mashup plugin that I'm using (which is still working fine). As a test I deactivated it. I was still redirected to the homepage but the error message obviously wasn't there.
I look forward to hearing back from someone. Thanks!
Brett