Android application crashing when adding button in -

right i'm stuck, , puzzled. have created app , works fine in every other way, having issues buttons in couple of pages.

i have copied java , xml pages know work. doesn't solve issue. if take buttons out of java file compiles , runs , loads page.

however if put button text (that works every other page) in doesn't load page when start activity

this error log

05-09 13:19:33.724: d/androidruntime(896): shutting down vm 05-09 13:19:33.724: w/dalvikvm(896): threadid=1: thread exiting uncaught exception     (group=0x2bc9a300) 05-09 13:19:33.735: e/androidruntime(896): fatal exception: main 05-09 13:19:33.735: e/androidruntime(896): android.content.activitynotfoundexception:     unable find explicit activity class {com.british.sheep/com.british.sheep.mix}; have     declared activity in androidmanifest.xml? 05-09 13:19:33.735: e/androidruntime(896):  @ android.app.instrumentation.checkstartactivityresult(instrumentation.java:1541) 05-09 13:19:33.735: e/androidruntime(896):  @ android.app.instrumentation.execstartactivity(instrumentation.java:1416) 05-09 13:19:33.735: e/androidruntime(896):  @ android.app.activity.startactivityforresult(activity.java:3351) 05-09 13:19:33.735: e/androidruntime(896):  @ android.app.activity.startactivityforresult(activity.java:3312) 05-09 13:19:33.735: e/androidruntime(896):  @ com.british.sheep.colour$4.onclick(colour.java:62) 05-09 13:19:33.735: e/androidruntime(896):  @ android.view.view.performclick(view.java:4084) 05-09 13:19:33.735: e/androidruntime(896):  @ android.view.view$performclick.run(view.java:16966) 05-09 13:19:33.735: e/androidruntime(896):  @ android.os.handler.handlecallback(handler.java:615) 05-09 13:19:33.735: e/androidruntime(896):  @ android.os.handler.dispatchmessage(handler.java:92) 05-09 13:19:33.735: e/androidruntime(896):  @ android.os.looper.loop(looper.java:137) 05-09 13:19:33.735: e/androidruntime(896):  @ android.app.activitythread.main(activitythread.java:4745) 05-09 13:19:33.735: e/androidruntime(896):  @ java.lang.reflect.method.invokenative(native method) 05-09 13:19:33.735: e/androidruntime(896):  @ java.lang.reflect.method.invoke(method.java:511) 05-09 13:19:33.735: e/androidruntime(896):  @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:786) 05-09 13:19:33.735: e/androidruntime(896):  @ com.android.internal.os.zygoteinit.main(zygoteinit.java:553) 05-09 13:19:33.735: e/androidruntime(896):  @ dalvik.system.nativestart.main(native method) 

like know button code works have used many other apps perfectly. im stuck. rest of code works when add buttons in.

what

public class creamy extends activity {  /** called when activity first created. */ @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);    //makes full screen , takes away title bar     requestwindowfeature(window.feature_no_title);     getwindow().setflags(windowmanager.layoutparams.flag_fullscreen, windowmanager.layoutparams.flag_fullscreen);     //     setcontentview(r.layout.creamy);        button wensleydale = (button) findviewbyid(r.id.wensleydale);     wensleydale.setonclicklistener(new view.onclicklistener() {         public void onclick(view view) {             intent myintent = new intent(view.getcontext(), wensleydale.class);             startactivityforresult(myintent, 0);                 }               });  } //code menu add pages  @override public boolean oncreateoptionsmenu(menu menu) {     menuinflater inflater = getmenuinflater();     inflater.inflate(r.menu.menu, menu);     return true; }  @override public boolean onoptionsitemselected(menuitem item) {     switch (item.getitemid()) {         case r.id.text:     intent intent = new intent(intent.action_main);         intent.addcategory(intent.category_home);         intent.setflags(intent.flag_activity_new_task);         startactivity(intent);         break;         case r.id.cat:           startactivity(new intent(getapplicationcontext(), creamy.class));         break;         case r.id.ato:           startactivity(new intent(getapplicationcontext(), atoz.class));         break;     }     return true;     } //end code menu      } 

thats activity code, same other activity know works except class name , set content view layout

declaire activity in manifest

<activity android:name="com.british.sheep.mix" />             <intent-filter>                 <action android:name="android.intent.action.main" />                 <category android:name="android.intent.category.launcher"/>             </intent-filter>          </activity>