use a loader that can find the reflection delegate.

weaver/src/org/aspectj/weaver/ltw/LTWWorld.java

@@ -105,7 +105,7 @@ public class LTWWorld extends BcelWorld implements IReflectionWorld {
         if (fc=='j' || fc=='c' || fc=='o' || fc=='s') { // cheaper than imminent string startsWith tests
 	        if (name.startsWith("java") || name.startsWith("com.sun.") || name.startsWith("org.w3c") || 
 	        	name.startsWith("sun.") || name.startsWith("org.omg")) {
-		        ReferenceTypeDelegate bootstrapLoaderDelegate = resolveReflectionTypeDelegate(ty, null);
+		        ReferenceTypeDelegate bootstrapLoaderDelegate = resolveReflectionTypeDelegate(ty, loader);
 		        if (bootstrapLoaderDelegate != null) {
 		            // it's always fine to load these bytes: there's no weaving into them
 		            // and since the class isn't initialized, all we are doing at this point is loading the bytes

weaver/src/org/aspectj/weaver/reflect/ReflectionBasedReferenceTypeDelegateFactory.java

@@ -51,13 +51,12 @@ public class ReflectionBasedReferenceTypeDelegateFactory {
 	// can return 'null' if we can't find the class
 	private static ReflectionBasedReferenceTypeDelegate create15Delegate(ReferenceType forReferenceType, Class forClass, ClassLoader usingClassLoader, World inWorld) {
 		try {
-			Class delegateClass = Class.forName("org.aspectj.weaver.reflect.Java15ReflectionBasedReferenceTypeDelegate");//,false,usingClassLoader);//ReflectionBasedReferenceTypeDelegate.class.getClassLoader()); 
+			Class delegateClass = Class.forName("org.aspectj.weaver.reflect.Java15ReflectionBasedReferenceTypeDelegate",true,usingClassLoader);//,false,usingClassLoader);//ReflectionBasedReferenceTypeDelegate.class.getClassLoader()); 
 			ReflectionBasedReferenceTypeDelegate ret = (ReflectionBasedReferenceTypeDelegate) delegateClass.newInstance();
 			ret.initialize(forReferenceType,forClass,usingClassLoader,inWorld);
 			return ret;
 		} catch (ClassNotFoundException cnfEx) {
-			return null;
-			//throw new IllegalStateException("Attempted to create Java 1.5 reflection based delegate but org.aspectj.weaver.reflect.Java15ReflectionBasedReferenceTypeDelegate was not found on classpath");
+			throw new IllegalStateException("Attempted to create Java 1.5 reflection based delegate but org.aspectj.weaver.reflect.Java15ReflectionBasedReferenceTypeDelegate was not found on classpath");
 		} catch (InstantiationException insEx) {
 			throw new IllegalStateException("Attempted to create Java 1.5 reflection based delegate but InstantiationException: " + insEx + " occured");
 		} catch (IllegalAccessException illAccEx) {