Lg hl-dt-st dvdram gh20ns15 DVD writer problem

I hae got some problem related to LG DVD writer:

  1. DVD writer was functioing just fine but all of a sudden don’t know what happen the following error occure:

a) When I put Blank DVD the drive icon changes to CD DRIVE.

b) Burning software sometimes doesn’t find any Burning device.

c) If it finds one, after adding fles to the drive and When click next to go to the next page the burn button remains dim no matter what i select like “Verify data after burning” etc.

How can I solve these problem.

PROBLEM PICTURE 01

POBLEM PCTURE 02

N.B.: i have attached picture of the situation hope this will be helpful to solve the problem.

Thank You in advance.