telnet disconnecting my mapped drives.

I don't know if this is the place for this, but:

If I use sc \\servername start tlntsvr
then telnet servername
then sc \\servername stop tlntsvr when I'm done

All net use mappings disappear on the server and then have to be remapped
manually or the server rebooted. I thought this was going to work nicely
but apparently not.

Any ideas. Please help.

TIA
Parley