--- branches/development/src/nonbonded/SC.cpp	2011/04/08 21:25:19	1545
+++ branches/development/src/nonbonded/SC.cpp	2011/04/27 18:38:15	1549
@@ -359,7 +359,7 @@ namespace OpenMD {
       RealType dvpdr = res.second;
       
       RealType pot_temp = vptmp - vcij;
-      idat.vpair[3] += pot_temp;
+      idat.vpair += pot_temp;
       
       RealType dudr = drhodr * (idat.dfrho1 + idat.dfrho2) + dvpdr;