Replication Subscribers and AlwaysOn Availability Groups (SQL Server)

AlwaysOn Availability Groups with Replication Subscribers is running successfully with one publisher using below command.. -- commands to execute at the publisher, in the publisher database:

EXEC sp_addsubscription @publication = N'yocc_pub', 
       @subscriber = N'repl_agl', 
       @destination_db = N'YOCCDB', 
       @subscription_type = N'Push', 
       @sync_type = N'automatic', @article = N'all', @update_mode = N'read only', @subscriber_type = 0;
GO

EXEC sp_addpushsubscription_agent @publication = N'yocc_pub', 
       @subscriber = N'repl_agl', 
       @subscriber_db = N'YOCCDB', 
       @job_login = null, @job_password = null, @subscriber_security_mode = 1;
GO

all are done successfully.. my problem is "i want to add one more publisher " to alwayson subscriber and i am getting some error which is given below..

sql server error-21488 sql server error-18752

Note:-

• node-1 (alwayson primary node and replication subscriber)
• node-2 (secondary replica and report server)
• node-3 (publisher 1)/yocc_pub(work as distributor)
• node-4 (publisher 2)/yocc_pub2(configure successfully but got error-21488,18752)
• listener name - repl_agl
• database - yoccdb