CD/DVD drive error

[dom31]

i've got an old pentium3 that i've just starting using again for the dvd player. the drive will read data discs and music cds but when it comes to dvds, i cant watch the films. i can explore the dvd files but the software i am using acts as if there is no dvd in the drive. i reinstalled the software and tried using completly different software but this has no afect. anyone got any ideas.

 

[mailpup]

What is the DVD drive and what software are you using?