diff --git a/maidroid/api.lua b/maidroid/api.lua
index 36576ad..74a9d1e 100644
--- a/maidroid/api.lua
+++ b/maidroid/api.lua
@@ -361,15 +361,17 @@ function maidroid.register_maidroid(product_name, def)
 			self.pause = false
 			if self.core_name ~= "" then
 				local core = maidroid.registered_cores[self.core_name]
-				core.on_pause(self)
+				core.on_resume(self)
 			end
 		else
 			self.pause = true
 			if self.core_name ~= "" then
 				local core = maidroid.registered_cores[self.core_name]
-				core.on_resume(self)
+				core.on_pause(self)
 			end
 		end
+
+		update_infotext(self)
 	end
 
 	-- register a definition of a new maidroid.
diff --git a/maidroid_core/cores/basic.lua b/maidroid_core/cores/basic.lua
index 26dc95d..417d9e2 100644
--- a/maidroid_core/cores/basic.lua
+++ b/maidroid_core/cores/basic.lua
@@ -6,6 +6,7 @@
 local state = {IDLE = 0, ACCOMPANY = 1}
 
 local function on_start(self)
+	print("KOKO")
 	self.state = state.IDLE
 	self.object:setacceleration{x = 0, y = -10, z = 0}
 	self.object:setvelocity{x = 0, y = 0, z = 0}