network driver at login scripts

Hi, help please.

i’m trying to set up a login script to map a network drive. User account is part of Domain Controller running on Win NT. I’m using the script below but when logging on it doesn’t like the first line about deleting the current I:\

net use I: delete
net use I: \\prem-ins\Apps

have used the pause function so see what it says and it shows
system error 67 has occured
the network name connot be found.

should I be using someother command instead on delete