help sharing files vpn

Hello IT world
I recently setup a vpn connection on 2 xp pro sp2 systems (home to office)with no problems. Now what I am having trouble is setting up a mapped network drive to browse through the files on vpn server. While connected through vpn, on client vpn, I’ve gone to my network places> add network place> and then went to where I input \\server\share and I get an error saying “the folder you entered is not valid”. I’ve made sure my vpn server folder is shared. Please help