Do you know which file system the TrueCrypt drive has been formated with? FAT or OS X Extended Journaled?
There are suspicions now from your reply that the TrueCrypt container is corrupted and requires a " repair disk " and "repair permissions" which you run from Disk Utility.app under the directory: /Applications/Utilities. Under Disk Utility too, you can find the file system this conainer is using.
- Before performing the above, dismount and take a backup copy of the TrueCrypt container file to another disk partition.
- Make sure you can mount this backup and view existing files. Dismount the backup before proceeding.
- This step is performed in case the repair and/or repair of permissions corrupt the TrueCrypt container and the files within it are lost forever. Then you can use the backup copy to access your existing files without loss.
All of the above posts are exercising caution in using the rm command. This is because experienced advice will be given to you so the outcome is you move on, but with minimizing the loss of your files.
Hope you understand. See how it goes.