Rebuild thumbnails error

Hi Bob
I just upgraded from 1.3 to 2.1.1 and receive an error when rebuilding the thumbnails:

Error Info
ErrorException: copy(/home/xxx/public_html/data/showcase/22/22642-f7e62ec175fcbd6f6b191f8e8fd828a6.jpg): failed to open stream: Permission denied - library/NFLJ/Showcase/CacheRebuilder/Thumbnail.php:86
Generated By: Admin, A moment ago
Stack Trace

#0 [internal function]: XenForo_Application::handlePhpError(2, 'copy(/home/xxx...', '/home/xxx/pub...', 86, Array)
#1 /home/xxx/public_html/library/NFLJ/Showcase/CacheRebuilder/Thumbnail.php(86): copy('/home/xxx/pub...', '/home/xxx/pub...')
#2 /home/xxx/public_html/library/XenForo/ControllerHelper/CacheRebuild.php(26): NFLJ_Showcase_CacheRebuilder_Thumbnail->rebuild(0, Array, NULL)
#3 /home/xxx/public_html/library/XenForo/ControllerAdmin/Tools.php(82): XenForo_ControllerHelper_CacheRebuild->rebuildCache(Array, 'http://www.recr...', 'admin.php?tools...', true)
#4 /home/xxx/public_html/library/XenForo/FrontController.php(347): XenForo_ControllerAdmin_Tools->actionCacheRebuild()
#5 /home/xxx/public_html/library/XenForo/FrontController.php(134): XenForo_FrontController->dispatch(Object(XenForo_RouteMatch))
#6 /home/xxx/public_html/admin.php(13): XenForo_FrontController->run()
#7 {main}

Request State

array(3) {
["url"] => string(63) "http://www.recreationalflying.com/admin.php?tools/cache-rebuild"
["_GET"] => array(1) {
["tools/cache-rebuild"] => string(0) ""
}
["_POST"] => array(5) {
["process"] => string(1) "1"
["caches"] => string(39) "[["ShowcaseThumbnails",{"batch":"10"}]]"
["position"] => string(1) "0"
["redirect"] => string(67) "http://www.recreationalflying.com/admin.php?tools/rebuild&success=1"
["_xfToken"] => string(8) "********"
}
}

 

Thanks Bob, that fixed it...had to change them all to 777 the same as the attachments folder