diff --git a/checks/nc_groupquota b/checks/nc_groupquota
index 39ec708..f180817 100644
--- a/checks/nc_groupquota
+++ b/checks/nc_groupquota
@@ -35,17 +35,17 @@ def check_nc_groupquota(item, params, info):
         return
 
     perfdata = [
-        ( "quota", int(group[2]), int(group[1])/100*params["levels"][0], int(group[1])/100*params["levels"][1] ),
+        ( "quota", int(group[2])/1024/1024, int(group[1])/1024/1024/100*params[0], int(group[1])/1024/1024/100*params[1] ),
     ]
     #check counter
-    if 100*int(group[2])/int(group[1]) >= params["levels"][1]:
-        yield 2, "quota using {} exceeted crit level of {}%".format(100*int(group[2])/int(group[1]), params["levels"][1]), perfdata
+    if 100*int(group[2])/int(group[1]) >= params[1]:
+        yield 2, "quota using {} exceeted crit level of {}%".format(int(100*int(group[2])/int(group[1])), params[1]), perfdata
         return
-    if 100*int(group[2])/int(group[1]) >= params["levels"][0]:
-        yield 1, "quota using {} exceeted warn level of {}%".format(100*int(group[2])/int(group[1]), params["levels"][0]), perfdata
+    if 100*int(group[2])/int(group[1]) >= params[0]:
+        yield 1, "quota using {} exceeted warn level of {}%".format(int(100*int(group[2])/int(group[1])), params[0]), perfdata
         return
-    if 100*int(group[2])/int(group[1]) < params["levels"][0]:
-        yield 0, "quota using {}%".format(100*int(group[2])/int(group[1])), perfdata
+    if 100*int(group[2])/int(group[1]) < params[0]:
+        yield 0, "quota using {}%".format(int(100*int(group[2])/int(group[1]))), perfdata
         return
 
     yield 3, "error occured in check plugin."