Cannot close burned cd's

I really need help.

I have tried numerous times to burn a cd (data), and every time it is almost finished i get an error that says it is nunabl to “close” the cd. I can still read it fine from my burner (of course), but I cannot read it from a normal cdrom.

Any suggestions would be greatly appresiated.

I am using EZ-Cd craetor 4.1 deluxe and a plextor burner.