The EZTASKS entry in ADSPROF is really a pointer to the system files ( not to a single file ) that control data access, multi user access, and record and file locking. The files in the folder pointed to by this entry ( and in the subfolders) are codependent on each other.

In your incorrect setup you load system files from D:\Softrak\System and then point to a different set of files.

Are all the files in C:\Softrak\System identical to D:\Softrak\System?