NWBC 5.0 invalid URL

Dear

we have installed NWBC 5.0 while config it shows invalid URL.....

http://<fully qualified host name>:<http port>/sap/bc/nwbc/nwbc_launch  our afcr3xxci and port is 8001

goto -> parameters -> display -> check icm/host_name_full, here the fqdn is shown  afcr3xxci

when i give

http://afcr3xxxci:8001/sap/bc/nwbc/nwbc_launch it said invalid URL

and not able to start with nwbc

our all service are activated in sicf

give some suggestion

is it compulsory to icm/host_name_full   to maintain

Regards