Trouble using VPN

I've been unable to use a VPN connection to my work computer since I upgraded
my home box to Vista. The interface opens but I get a "could not connect to
server" pop-up and a "disconnected" message on the VPN page. I have settings
the same as I did on XP, but no luck. Any suggestions.

New Cryptographic Support L2TP/IPsec-based VPN connections now suppor
the Advanced Encryption Standard (AES) with 128 and 256-bit keys.
Support for weaker cryptographic algorithms—40 and 56-bit MPPE for PPT
and DES with MD5 for L2TP/IPSec—has been disabled by default.

To enable 40 and 50-bit MPPE for PPTP-based connections and DES wit
MD5 for L2TP/IPSec connections, create and set th
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Servic es\Rasman\Parameters\AllowPPTPWeakCrypt
registry value (DWORD) to 1, and then restart the computer.

Without the registry key modification, Vista simply reports a failur
in connecting and offers a diagnostics option. Of course that optio
doesn't find anything wrong

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Elmtailye