I recently got IPv6 working with AICCU Command Line on Windows XP...then I went on vacation and a windows update upgraded from TAPv8 to TAPv9 and everything stopped; I tried reinstalling, and now nothing seems to work. Originally, I tried the GUI mode for AICCU and it seemed to fail; I'm behind a NAT device with a static IP, so I tried setting things with 'netsh', and with the console mode, I got things to work, but it created 'aiccu' rather than 'sixxs' interface. I read the FAQ and it said that if there is a mismatch in names, and there is more than one interface, AICCU will fail, so I disabled any/all other TAP interfaces. I uninstalled IPv6 and reinstalled, and tried to recreate...not successful. At one point, 'autotest' worked up until part 6, indicating a route/interface problem (I disabled my firewall, usual ports are open on router). Since I tried to reinstall TAPv8, and I deleted the entries, though 'aiccu' still lists itself as v9, and I get a general failure of "No Working TAP device Found" ----------------snippet from autotest---------------- Succesfully retrieved tunnel information for T32857 sock_printf() : "QUIT Schaltet den schmerz ab" Tunnel Information for T32857: PoP Id : usphx01 IPv6 Local : 2001:1938:81:12d::2/64 IPv6 Remote : 2001:1938:81:12d::1/64 Tunnel Type : ayiya Adminstate : enabled Userstate : enabled Name : My First Tunnel Flag: HAS_IFHEAD not present Flag: NEED_IFHEAD not present [warning] Couldn't open registry key: SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}\0000\ComponentId (t2/2 vs 0/1704 vs 1) Found interface named 'aiccu', with guid {08FD43E5-D33A-4ACD-99D6-257EAEE12011}, using it [tun-start] Trying \\.\Global\{08FD43E5-D33A-4ACD-99D6-257EAEE12011}.tap [error] [tun-start] Problem while enumerating key SYSTEM\CurrentControlSet\Control\Network\{4D36E972-E325-11CE-BFC1-08002BE10318} [error] [tun-start] No working Tap device found! [error] Tunnel Setup Failed ------------------------------- I couldn't find the registry entry using 'regedit', BTW... -------------------------------partial output of ipconfig/all-------- Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : cmilono.com Description . . . . . . . . . . . : Intel(R) 82562V 10/100 Network Connection Physical Address. . . . . . . . . : 00-16-76-B9-84-A1 Dhcp Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes IP Address. . . . . . . . . . . . : 192.168.1.102 Subnet Mask . . . . . . . . . . . : 255.255.255.0 IP Address. . . . . . . . . . . . : fe80::216:76ff:feb9:84a1%4 Default Gateway . . . . . . . . . : 192.168.1.1 DHCP Server . . . . . . . . . . . : 192.168.1.1 DNS Servers . . . . . . . . . . . : 208.201.224.11 208.201.224.33 fec0:0:0:ffff::1%5 fec0:0:0:ffff::2%5 fec0:0:0:ffff::3%5 Lease Obtained. . . . . . . . . . : Sunday, June 13, 2010 12:48:33 PM Lease Expires . . . . . . . . . . : Monday, June 14, 2010 12:48:33 PM Ethernet adapter aiccu: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : TAP-Win32 Adapter V9 Physical Address. . . . . . . . . : 00-FF-08-FD-43-E5 Dhcp Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes Autoconfiguration IP Address. . . : 169.254.228.170 Subnet Mask . . . . . . . . . . . : 255.255.0.0 IP Address. . . . . . . . . . . . : 2001:1938:81:12d::2 IP Address. . . . . . . . . . . . : fe80::2ff:8ff:fefd:43e5%5 Default Gateway . . . . . . . . . : 2001:1938:81:12d::1 DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%3 fec0:0:0:ffff::2%3 fec0:0:0:ffff::3%3 ----------------------------- I'm more of a Linux person, but I can't do this at 'work' due to firewall issues, and due to family issues Linux won't be useful at home, so I'm stuck with XP (and I'm not a Windows expert). Any 'recipe' to get this back? I'm using XP SP3. I'll open a ticket if this forum can't help... TIA.