PHP_PRINTER.DLL - NetBIOS prints, TCP/IP doesn't

Hi you all, I'm trying to print on clients printers. Now it works fine, but only using NetBIOS clients names in a LAN. I mean that using the following sintax it does work fine $printer = "\\\\"."CLIENTNAME"."\\"."PRINTERNAME"; $handle = printer_open($printer); but suppose that CLIENTNAME ip is 192.168.0.15, well if I try printing using $printer = "\\\\"."192.168.0.15"."\\"."PRINTERNAME"; $handle = printer_open($printer); doesn't work and if you look @ apache errors.log file you understand that printer was not found. If printing "via tcp" is not possible... how do I print on a remote site? I tried a VPN connection form CLIENTNAME and SERVER (ip 192.168.0.100) using Windows XP built in VPN server and client. Connection succeeded, but browsing network for workgorup computers, from the SERVER I don't see the CLIENTNAME. Instead of this I tried to run the classic Run... with \\192.168.0.15 and WOW I've been prompted for user name and password. WOW, it does work, I see shared folders and the shared printer... but as said above... I cannot print on it. Viceversa from the CLIENTNAME browser I connect fine to http://192.168.0.100. HELP Thank you in advance for any answer/tip/or help Robert