hangup button is not working

Hi,

I am working on voipdrupal and facing a issue, when we are sending a call to subscriber for recording over mobile, it works, call is recording also generating a mp3 file, all data entry goes to the phonerecorder table ,means plivo is working well but the issue is that phone call button shows 'calling' after even call is completed. After saving the content type, fid does not insert into the content type when we insert fid manually on the content type table.it shows the mp3 file. it works. Hangup doesn't work.