Hi,
Don't worry. I'll guide you through.
First, uninstall all the 3 plugins. Then reinstall just one: the googleMaps plugin.
The other 2 plugins make use of the googleMaps plugin. So let's make sure that this works first before installing the other two. This also makes it much easier to identify where the problem is.
1) Install the googleMaps plugin.
2) Go to the Plugin Manager and enable the plugin.
3) Go to Article Manager and create a new article.
4) Go to
http://www.kksou.com/php-gtk2/Joomla-Gadgets/googleMaps-plugin.php#how_to_use
And copy and paste any of the sample code there.
Make sure you use the WYSIWYG mode (not the HTML source mode).
Click Save or Apply.
5) Now load the article. Did you see the google map displayed?
6) If yes, you can try some other sample tags here:
http://www.kksou.com/php-gtk2/Joomla-Google-Maps-Samples/
7) If no, please let me know what you see on the screen, and if you see any error messages.
Regards,
/kksou