not enough space available on the mounted disc

[zilda]

hya Roy
The disc media is set at 80 mins.

somtimes when i try to add files a yellow alert box appears saying the write disc time remaining is 78-30 which is too short to add the selected track(s)

then if i shut micro studio down and try again as i add the files the remaining time comes down to say 7 mins left after 18 tracks added, when i try to burn disc i get the following message not enough space available on the mounted disc and the disc is ejected from plexter player.

on other occasions after all tracks are added (18) the time remaining is still 78-30


there is evidently something wrong somewhere, do i need to totally remove microstudio and re install it, then i get worried i may get into a mess with authorisation codes and end up with no micro studio at all

hope you can sort this for me best regards zilda