diff --git a/swarms/agents/utils/AgentManager.py b/swarms/agents/utils/AgentManager.py
index ad2b50fd..ba1e444d 100644
--- a/swarms/agents/utils/AgentManager.py
+++ b/swarms/agents/utils/AgentManager.py
@@ -13,8 +13,8 @@ from .AgentBuilder import AgentBuilder
 from .Calback import EVALCallbackHandler, ExecutionTracingCallbackHandler
 
 
-callback_manager_instance = CallbackManager()
-callback_manager_instance.set_handler(handler=EVALCallbackHandler())
+callback_manager_instance = CallbackManager(EVALCallbackHandler())
+
 
 class AgentManager:
     def __init__(self, toolsets: list[BaseToolSet] = []):