Imported files have error - please help

Question

I recently Imported 3 CD's however one of the CD files cause iTunes to display "An error occurred." whenever they are acted upon via mouse functions. I.e. single/double clicking them, trying to move them to playlists, etc. There is no number attached to the error and this is the full text:
An error occured
The Music Store could not process your request, please try again later.
The CD is: Grammy 2006 Nominees
The other files for the other 2 CD's act normally. I have tried deleting the files and re-importing them 2x now. I have tried running diagnostics on the CD with no errors showing on the diagnositcs. FYI here is the printout.
Microsoft Windows XP Home Edition Service Pack 2 (Build 2600)
Dell Inc. Dimension XPS
iTunes 6.0.2.23
CD Driver 2.0.4.3
CD Driver DLL 2.0.3.2
LowerFilters: Cdr4_xp (7.1.0.188), PxHelp20 (2.0.0.0), drvmcdb (1.0.0.1), sscdbhk5 (1.0.0.1),
UpperFilters: Cdralw2k (7.1.0.188), GEARAspiWDM (2.0.4.3),
Video Driver: NVIDIA GeForce 6800 \GeForce 6800
IDE\DiskST3160023AS____________________________8.12___, Bus Type ATA, Bus Address [0,0]
IDE\CdRomSAMSUNGCD-R/RW_SW-252S_________________R902___, Bus Type ATA, Bus Address [0,0]
IDE\CdRomNEC_DVD+-RW_ND-3450A___________________103C___, Bus Type ATA, Bus Address [1,0]
If you have multiple drives on the same IDE or SCSI bus, these drives may interfere with each other.
Some computers need an update to the ATA or IDE bus driver, or Intel chipset. If iTunes has problems recognizing CDs or hanging or crashing while importing or burning CDs, check the support site for the manufacturer of your computer or motherboard.
Current user is administrator.
D: SAMSUNG CD-R/RW SW-252S, Rev R902
Data or MP3 CD in drive.
Found 1 songs on CD, playing time 74:32 on CDROM media.
Track 1, start time 00:02:00
Get drive speed succeeded.
The drive CDR speeds are: 4 8 10 12 16 40 48.
The drive CDRW speeds are: 4.
E: _NEC DVD+-RW ND-3450A, Rev 103C
Audio CD in drive.
Found 21 songs on CD, playing time 79:55 on Audio CD.
Track 1, start time 00:02:00
Track 2, start time 03:30:61
Track 3, start time 07:51:72
Track 4, start time 11:15:38
Track 5, start time 14:21:65
Track 6, start time 18:34:74
Track 7, start time 22:17:23
Track 8, start time 27:08:52
Track 9, start time 31:42:37
Track 10, start time 34:42:62
Track 11, start time 37:56:21
Track 12, start time 41:42:30
Track 13, start time 45:37:58
Track 14, start time 48:46:34
Track 15, start time 53:00:24
Track 16, start time 57:22:23
Track 17, start time 61:38:44
Track 18, start time 65:36:23
Track 19, start time 69:36:36
Track 20, start time 72:56:31
Track 21, start time 76:23:28
Audio CD reading succeeded.
Get drive speed succeeded.
The drive CDR speeds are: 8 16 24 32 40 48.
The drive CDRW speeds are: 8.
The drive DVDR speeds are: 8.
The drive DVDRW speeds are: 8.

Answer 1

Thanks for responding.
Yes, I copied the whole project folder at once with all its subfolders. but I left the original location completely untouched. so why would that matter anyway.
everything else in the project appears to be completely in tact.
note: when I open up the song with the missing audio files, I notice that the record path is not assigned, which is perplexing as i did not touch this perameter. It is supposed to reflect the path of the project right? (all my other songs do this)
just now I tried recording a test audio track to see where the file goes when this parameter is left untouched and it automatically directed itself to the project folder. so I'm bafffled still.
I can't understand how files could disappear without my doing something. It seems if they are still in existence then my computer would have had to change the date that they were created. and perhaps the extensions of the file names fromm .aif to something else (yes, I double checked that parameter too; it records to .aif). There must a computer malfunction. I can't have this happen again(who can?). this is the worst type of recording accident and if it can't be explained then my whole Logic recording career feels at risk.