Drive mappings issue

Hi,
we have a logon script thats aps drives for users. The script maps drive N: through drive v:

On opening my computer all drives appear except T:

When i open command prompt and type net use i can see t: mappes

when i type t: in command prompt i can browse to T:

When i open word and click File Open i can see T: and access files on that drive

I am not sure why i cannot see T: from MY Computer or from explorer.

Thanks,