Index: /mods/mod_gutschein/wpsg_voucher.php
===================================================================
--- /mods/mod_gutschein/wpsg_voucher.php	(revision 8509)
+++ /mods/mod_gutschein/wpsg_voucher.php	(revision 8510)
@@ -142,6 +142,6 @@
         	if ($bCheckAdd) {
 			
-        		if (strtotime($this->start_date) > current_time('timestamp')) return false;
-				if (strtotime($this->end_date) < current_time('timestamp')) return false;
+        		if (strtotime($this->start_date) > time()) return false;
+				if (strtotime($this->end_date) < time()) return false;
 				if (!$this->isMultiUsable() && $this->getUsed() > 0) return false;
 				if ($this->getFreeAmount() <= 0) return false;