IPSEC tunnel issue

[Pradeep_Salunke]

Created the IPsec site to site tunnel. however it was showing as down. 

Checked traffic with peer ip address traffic however IKE traffic was dropped. Allowed the same now showing accepted. Still 4500 traffic was dropped.

logs below 

AK 0: Get before set operation succeeded of simple_debug_filter_off
[Expert@bu2-fw-01:0]# fw ctl zdebug + drop | grep 154.52.35.150
@;2332418538;[cpu_11];[fw4_0];fw_log_drop_ex: Packet proto=17 154.52.35.150:4500 -> 193.53.133.17:4500 dropped by vpn_drop_and_log Reason: Clear text packet should be encrypted;
@;2332434814;[cpu_11];[fw4_0];fw_log_drop_ex: Packet proto=17 154.52.35.150:4500 -> 193.53.133.17:4500 dropped by vpn_drop_and_log Reason: Clear text packet should be encrypted;
@;2332469207;[cpu_11];[fw4_0];fw_log_drop_ex: Packet proto=17 154.52.35.150:4500 -> 193.53.133.17:4500 dropped by vpn_drop_and_log Reason: Clear text packet should be encrypted;

Please help for this