error inrun bach file in policy

hi i have a bach file run .bat

this is in network \\dc\data

but wen run this file of this way , not run

i must map this way and run it to correct

now i create setup.bat  and it whole

======

net use  t: \\ dc\data

t:

call run .bat

====

when run setup.bat, map t, and run corect

now i create a policy and in script shutdown place the file setup.bat

but when shutdown pc,the shut down is very time and script not run

of corce a later 6 moon befor update windows , this policy work ok

ploease help me