Real time screen and inbound calls waiting for agents

hi,
i'm facing a strange issue with real-time screen (AST_timeonVDADall.php).
Every single outbound connected call waiting for agents is displayed here (like 1 calls waiting for agents). But in case of inbound calls, the call (waiting calls for agents) vanishes after few seconds. I tried to look into vicidial_auto_calls table, the entries are deleted from the table after few seconds.
Please help me to sort-out this inbound thing.
i'm facing a strange issue with real-time screen (AST_timeonVDADall.php).
Every single outbound connected call waiting for agents is displayed here (like 1 calls waiting for agents). But in case of inbound calls, the call (waiting calls for agents) vanishes after few seconds. I tried to look into vicidial_auto_calls table, the entries are deleted from the table after few seconds.
Please help me to sort-out this inbound thing.