diff --git a/src/scripts/controllers/main.js b/src/scripts/controllers/main.js
index 5c536a0d..58b40c2c 100644
--- a/src/scripts/controllers/main.js
+++ b/src/scripts/controllers/main.js
@@ -138,7 +138,18 @@
         };
 
         $scope.changeTasksState = function (state) {
-            var gids = $rootScope.taskContext.getSelectedTaskIds();
+            var tasks = $rootScope.taskContext.getSelectedTasks();
+            var gids = [];
+
+            var task = null;
+            for (let index = 0; index < tasks.length; index++) {
+                task = tasks[index];
+                if (state == 'start' && task.status != 'active' && task.status != 'waiting') {
+                    gids.push(task.gid)
+                }else if (state == 'pause' && task.status != 'paused'){
+                    gids.push(task.gid);
+                }
+            }
 
             if (!gids || gids.length < 1) {
                 return;
diff --git a/src/scripts/services/aria2RpcService.js b/src/scripts/services/aria2RpcService.js
index 960b40c2..f5333e24 100644
--- a/src/scripts/services/aria2RpcService.js
+++ b/src/scripts/services/aria2RpcService.js
@@ -338,12 +338,11 @@
 
                 for (var i = 0; i < context.gids.length; i++) {
                     contexts.push({
-                        silent: !!context.silent,
-                        gid: context.gids[i]
+                        'methodName': 'aria2.forceRemove', 'params': [context.gids[i]]
                     });
                 }
 
-                return invokeMulti(this.forceRemove, contexts, context.callback);
+                return this.multicall({'methods': contexts});
             },
             pause: function (context, returnContextOnly) {
                 return invoke(buildRequestContext('pause', context, context.gid), !!returnContextOnly);
@@ -359,12 +358,11 @@
 
                 for (var i = 0; i < context.gids.length; i++) {
                     contexts.push({
-                        silent: !!context.silent,
-                        gid: context.gids[i]
+                        'methodName': 'aria2.forcePause', 'params': [context.gids[i]]
                     });
                 }
 
-                return invokeMulti(this.forcePause, contexts, context.callback);
+                return this.multicall({'methods': contexts});
             },
             forcePauseAll: function (context, returnContextOnly) {
                 return invoke(buildRequestContext('forcePauseAll', context), !!returnContextOnly);
@@ -377,12 +375,11 @@
 
                 for (var i = 0; i < context.gids.length; i++) {
                     contexts.push({
-                        silent: !!context.silent,
-                        gid: context.gids[i]
+                        'methodName': 'aria2.unpause', 'params': [context.gids[i]]
                     });
                 }
 
-                return invokeMulti(this.unpause, contexts, context.callback);
+                return this.multicall({'methods': contexts});
             },
             unpauseAll: function (context, returnContextOnly) {
                 return invoke(buildRequestContext('unpauseAll', context), !!returnContextOnly);
@@ -455,12 +452,11 @@
 
                 for (var i = 0; i < context.gids.length; i++) {
                     contexts.push({
-                        silent: !!context.silent,
-                        gid: context.gids[i]
+                        'methodName': 'aria2.removeDownloadResult', 'params': [context.gids[i]]
                     });
                 }
 
-                return invokeMulti(this.removeDownloadResult, contexts, context.callback);
+                return this.multicall({'methods': contexts});
             },
             getVersion: function (context, returnContextOnly) {
                 return invoke(buildRequestContext('getVersion', context), !!returnContextOnly);