hi guys, i am using bitcomet 1.14 and i noticed that listen port is blocked (yellow light)

under statistics, it says

NAT port mapping: Failed [ADSL Company (http://19x.16x.x.xxx/)]


do anyone know how to solve this prob? I am so clueless, tried searching on google
and various websites but can't find the solution.
Please help, i really appreciate your help!
mod: i don't know where to put this topic in, i think* this is the right place, if i placed the topic on the wrong place pls correct me.thx ya!