Cisco Systems Error connecting using CISCO VPN Client 4.0.4(D)

Hi,

When i try to connect using the VPN Client 4.0.4(D) the following error
message shows up. Any ideas???

Cisco Systems VPN Client Version 4.0.4 (D)
Copyright (C) 1998-2003 Cisco Systems, Inc. All Rights Reserved.
Client Type(s): Windows, WinNT
Running on: 5.1.2600 Service Pack 2

1      16:13:22.644  07/08/05  Sev=Warning/2    CVPND/0xE3400003
Function RegOpenKey failed with an error code of
0x00000002(WindowsVirtualAdapter:557)

2      16:13:22.644  07/08/05  Sev=Warning/3    CVPND/0xE340000C
The Client was unable to enable the Virtual Adapter because it could
not open the device.

3      16:13:22.644  07/08/05  Sev=Warning/2    IKE/0xE3000099
Failed to active IPSec SA: Unable to enable Virtual Adapter
(NavigatorQM:938)

4      16:13:22.644  07/08/05  Sev=Warning/2    IKE/0xE30000A5
Unexpected SW error occurred while processing Quick Mode
negotiator:(Navigator:2202)

Warm regards,
Pavan

I have the windows XP filewall on and provided exceptions to the
ipsecdailer.exe and opened the following ports too
500
10000
62512 - 24

but still the problem persists.

I diable the windows firewall and still the problem persists.

When i connect, the status bar changes as follows:
'Authenticating user' -> 'Contacting the security gateway...' ->
'Negotiating Security Policies' -> 'Securing communications channel' ->
'Not connected'.

Dont know what hapens suddenly.. Other laptops in our company work
perfectly fine. I am using a Dell D610 with wi-fi connectivity. I
disabled the wireless connectivity but still the problem persists.

Donno what next to try. any suggestions?