TEST.ACD is the filename. What you need is the name of the program within RSLogix where the tag resides. By default it will be MainProgram. In that case, you would need to put:
PROGRAM:MainProgram.TMR_LOAD.ACC
in the PLCAddressValue property of the DigitalPanelMeter.
If you are unsure, try to create a timer as a controller scope tag, then you do not need to prefix it with a program name.