diff --git a/ShadowsocksX-NG/AppDelegate.swift b/ShadowsocksX-NG/AppDelegate.swift
index 3fc0af2..4f2f90f 100644
--- a/ShadowsocksX-NG/AppDelegate.swift
+++ b/ShadowsocksX-NG/AppDelegate.swift
@@ -78,6 +78,13 @@ class AppDelegate: NSObject, NSApplicationDelegate, NSUserNotificationCenterDele
         notifyCenter.addObserverForName(NOTIFY_SERVER_PROFILES_CHANGED, object: nil, queue: nil
             , usingBlock: {
             (note) in
+                let profileMgr = ServerProfileManager.instance
+                if profileMgr.activeProfileId == nil &&
+                    profileMgr.profiles.count > 0{
+                    if profileMgr.profiles[0].isValid(){
+                        profileMgr.setActiveProfiledId(profileMgr.profiles[0].uuid)
+                    }
+                }
                 self.updateServersMenu()
                 SyncSSLocal()
             }
diff --git a/ShadowsocksX-NG/Base.lproj/PreferencesWindowController.xib b/ShadowsocksX-NG/Base.lproj/PreferencesWindowController.xib
index 8142d87..c08dcca 100644
--- a/ShadowsocksX-NG/Base.lproj/PreferencesWindowController.xib
+++ b/ShadowsocksX-NG/Base.lproj/PreferencesWindowController.xib
@@ -16,6 +16,7 @@
                 <outlet property="profileBox" destination="oZ5-85-pwY" id="D19-PQ-X7E"/>
                 <outlet property="profilesTableView" destination="r91-ho-Lum" id="TNk-f6-Vgo"/>
                 <outlet property="remarkTextField" destination="q3C-S0-iNn" id="DSv-lV-PX7"/>
+                <outlet property="removeButton" destination="3ei-2f-kHB" id="DdP-dA-coT"/>
                 <outlet property="window" destination="F0z-JX-Cv5" id="gIp-Ho-8D9"/>
             </connections>
         </customObject>
diff --git a/ShadowsocksX-NG/PreferencesWindowController.swift b/ShadowsocksX-NG/PreferencesWindowController.swift
index 6cff2ce..086acd7 100644
--- a/ShadowsocksX-NG/PreferencesWindowController.swift
+++ b/ShadowsocksX-NG/PreferencesWindowController.swift
@@ -26,6 +26,7 @@ class PreferencesWindowController: NSWindowController
     
     @IBOutlet weak var copyURLBtn: NSButton!
     
+    @IBOutlet weak var removeButton: NSButton!
     let tableViewDragType: String = "ss.server.profile.data"
     
     var defaults: NSUserDefaults!
@@ -33,6 +34,7 @@ class PreferencesWindowController: NSWindowController
     
     var editingProfile: ServerProfile!
 
+
     override func windowDidLoad() {
         super.windowDidLoad()
 
@@ -64,6 +66,7 @@ class PreferencesWindowController: NSWindowController
     
     @IBAction func addProfile(sender: NSButton) {
         if editingProfile != nil && !editingProfile.isValid(){
+            shakeWindows()
             return
         }
         profilesTableView.beginUpdates()
@@ -95,11 +98,13 @@ class PreferencesWindowController: NSWindowController
         if editingProfile != nil {
             if !editingProfile.isValid() {
                 // TODO Shake window?
+                shakeWindows()
                 return
             }
         }
         profileMgr.save()
         window?.performClose(nil)
+
         
         NSNotificationCenter.defaultCenter()
             .postNotificationName(NOTIFY_SERVER_PROFILES_CHANGED, object: nil)
@@ -130,6 +135,12 @@ class PreferencesWindowController: NSWindowController
     }
     
     func updateProfileBoxVisible() {
+        if profileMgr.profiles.count <= 1 {
+            removeButton.enabled = false
+        }else{
+            removeButton.enabled = true
+        }
+
         if profileMgr.profiles.isEmpty {
             profileBox.hidden = true
         } else {
@@ -293,4 +304,27 @@ class PreferencesWindowController: NSWindowController
             }
         }
     }
+
+    func shakeWindows(){
+        let numberOfShakes:Int = 8
+        let durationOfShake:Float = 0.5
+        let vigourOfShake:Float = 0.05
+
+        let frame:CGRect = (window?.frame)!
+        let shakeAnimation = CAKeyframeAnimation()
+
+        let shakePath = CGPathCreateMutable()
+        CGPathMoveToPoint(shakePath, nil, NSMinX(frame), NSMinY(frame))
+
+        for _ in 1...numberOfShakes{
+            CGPathAddLineToPoint(shakePath, nil, NSMinX(frame) - frame.size.width * CGFloat(vigourOfShake), NSMinY(frame))
+            CGPathAddLineToPoint(shakePath, nil, NSMinX(frame) + frame.size.width * CGFloat(vigourOfShake), NSMinY(frame))
+        }
+
+        CGPathCloseSubpath(shakePath)
+        shakeAnimation.path = shakePath
+        shakeAnimation.duration = CFTimeInterval(durationOfShake)
+        window?.animations = ["frameOrigin":shakeAnimation]
+        window?.animator().setFrameOrigin(window!.frame.origin)
+    }
 }