Fix last sync inequality, a=chris

diff --git a/bin/mirror.php b/bin/mirror.php
index 6fd7e9c67..4bedba5a9 100644
--- a/bin/mirror.php
+++ b/bin/mirror.php
@@ -215,7 +215,7 @@ class Mirror implements CrawlConstants
             "&robot_instance=".ROBOT_INSTANCE."&machine_uri=".WEB_URI.
             "&last_sync=".$this->last_sync;
         if($this->start_sync <= $this->last_sync &&
-            $this->last_sync + MIRROR_SYNC_FREQUENCY > $time) {
+            $this->last_sync + MIRROR_SYNC_FREQUENCY < $time) {
             $request .= "&a=syncList";
             crawlLog("Getting Sync List...");
             $info_string = FetchUrl::getPage($request, NULL, true);