Hi - I have recenly inherited a Joomla site to maintain. It has SIG installed. I setup a local copy on my test server so that I could implement a few changes the client wanted including changing the pages where the 2 galleries are to be displayed. All works fine on my dev/test system (Win7) and loaded the site to a new hosting provider.
The Host has PHP5.3.6 and I have checked the directories for 755 and 644.
The pages where the galleries are supposed to be just display the plugin code - eg: {gallery}lodge-gallery{/gallery}
AFAIK I have all the correct permissions. eg:
/cache 755
/cache/jw_simpleImageGallery 755 (and I checked this directory and it has many cache files in it)
/images is 755
/images/lodge-gallery is 755 and had the uploaded image files as does the second gallery directory
I have gone thru several posts in this forum as well as the PRO version forum but dont seem to be able to find a solution that matches my problem. Most likely a permissions issue somewhere else.
BTW: I am a Joomla Noobie - so please be gentle

Incidently, I have attached an image showing what the PlugIn manager displays for SIG on the production site.
Also, on my Dev system I get lots of error messages along the lines of the following:
Strict Standards: Non-static method SimpleImageGalleryHelper::getTemplatePath() should not be called statically, assuming $this from incompatible context in C:\vhosts\www.ironstone2012\plugins\content\jw_simpleImageGallery\jw_simpleImageGallery.php on line 158 Strict Standards: Only variables should be assigned by reference in C:\vhosts\www.ironstone2012\plugins\content\jw_simpleImageGallery\jw_simpleImageGallery\includes\helper.php on line 255