Index: trunk/psphot/src/models/pmModel_GAUSS.c
===================================================================
--- trunk/psphot/src/models/pmModel_GAUSS.c	(revision 5593)
+++ trunk/psphot/src/models/pmModel_GAUSS.c	(revision 8882)
@@ -139,12 +139,12 @@
 
     dP = 0;
-    dP += PS_SQR(dPAR[4] / PAR[4]);
-    dP += PS_SQR(dPAR[5] / PAR[5]);
+    dP += PS_SQR(dPAR[PM_PAR_SXX] / PAR[PM_PAR_SXX]);
+    dP += PS_SQR(dPAR[PM_PAR_SYY] / PAR[PM_PAR_SYY]);
     dP = sqrt (dP);
 
     status = true;
     status &= (dP < 0.5);
-    status &= (PAR[1] > 0);
-    status &= ((dPAR[1]/PAR[1]) < 0.5);
+    status &= (PAR[PM_PAR_FLUX] > 0);
+    status &= ((dPAR[PM_PAR_FLUX]/PAR[PM_PAR_FLUX]) < 0.5);
 
     if (status) return true;