diff --git a/presentation/lookAndFeel/knowledgeTree/stylesheet.css b/presentation/lookAndFeel/knowledgeTree/stylesheet.css
index 1520152..95792af 100644
--- a/presentation/lookAndFeel/knowledgeTree/stylesheet.css
+++ b/presentation/lookAndFeel/knowledgeTree/stylesheet.css
@@ -99,3 +99,10 @@ TH {
     font-family : Verdana,sans-serif;
 }
 
+.errorText {
+	color : #FF0000;
+	font-size : 10pt;
+	text-align : center;
+	font-family : Verdana,sans-serif;
+}
+