Switch N4032F "show isdp neighbors" problem

Please help how to configure isdp on N4032F, i have N2048 the command "show isdp neighbor" is running, but on N4032 not running, error "Table is empty" The switch shows to be transmitting packets but not receiving any isdp packets. Which port connects to the N2000 switch CORESWITCH_01#show isdp traffic ISDP Packets Received.......................... 0 ISDP Packets Transmitted....................... 4982448 ISDPv1 Packets Received........................ 0 ISDPv1 Packets Transmitted..................... 0 ISDPv2 Packets Received........................ 0 ISDPv2 Packets Transmitted..................... 4982448 ISDP Bad Header................................ 0 ISDP Checksum Error............................ 0 ISDP Transmission Failure...................... 0 ISDP Invalid Format............................ 0 ISDP Table Full................................ 0 ISDP IP Address Table Full..................... 0 CORESWITCH_01#show isdp interface all Interface Mode --------------- ---------- Te1/0/1 Enabled Te1/0/2 Enabled Te1/0/3 Enabled Te1/0/4 Enabled Te1/0/5 Enabled Te1/0/6 Enabled Te1/0/7 Enabled Te1/0/8 Enabled Te1/0/9 Enabled Te1/0/10 Enabled Te1/0/11 Enabled Te1/0/12 Enabled Te1/0/13 Enabled Te1/0/14 Enabled Te1/0/15 Enabled Te1/0/16 Enabled Te1/0/17 Enabled Te1/0/18 Enabled Te1/0/19 Enabled Te1/0/20 Enabled Te1/0/21 Enabled Te1/0/22 Enabled Te1/0/23 Enabled Te1/0/24 Enabled i run the following commands #no isdp enable #clear isdp table #clear isdp counters #isdp enable but still no working