Can you even see the disk in WinTec (does it appear in A43?) If not, then the problem is you don't have the right disk drivers included in your disk image - Windows will always show the disk, encrypted or not, as long as it can see it.
If the disk is there, and you are using an old version of WinTech, you might need to give it a poke, just open the workspace, load up a sector and decrypt it. That should inspire WinTec to mount the drive.
New versions don't suffer from this problem.
What information do you see when you try to display Disk Information in one of WinTech menus?
Do you see disk partitions (at least)?