Audio Problem in Dell Inspiron N5110 after migrating on Windows 8.1

Hello Everyone,

I have installed latest IDT High Definition Audio drivers available on Dell Support Center for windows 8. After installing everything work well if i use internal mic. When i use external mic ,after enabling Jack mic, Recording playback device changed status to  "Currently Unavailble". When i use internal mic it works ok. I dont know how to solve this problem.From the start i am using this laptop it works perfect except audio problems.Please share a solution for this.

Thanks