not able to upgrade to 12.04

hi
i installed ubuntu 11.10 using wubi, now i want to upgrade to 12.04, also i dont want to keep my other os, that is windows xp.
i downloaded the alternate cd image of 12.04 and tried to install it by usb / dvd.. none of it worked.. on upgrading from usb stick it said
There was a error adding the CD, the upgrade will abort. Please report this as a bug if this is a valid Ubuntu CD.

The error message was:
'Unable to locate any package files, perhaps this is not a Ubuntu Disc or the wrong architecture?'

   and with dvd i think it didnt burned properly, the dvd doesnt responds only.

on using update manager it says

Not all updates can be installed
run a partial upgrade to install as many updates as possible.
  i m not doing this partial upgrade as my internet connection is a bit slow.
 also i want to know how to use this command??
  README

   crclient 1.1 for Unix/Linux

Contents
 * Introduction
 * Options
 * Example of Configuration File

Introduction

  crclient is a part of the 24online product (Elitecore) which is a complete solution
 to "Billing & Bandwidth Management".

  This tool provides an interface for the client to send authentication request to
 the 24online server.

Options

 -u : The option is responsible for sending a login request to the server. It requires
  username as a parameter.

 -s : The option is for setting preferences for the client. Preferences such as AskonExit,
  AutoLogin, ShowNotification and Server Address can be set using this option. The
  preference values are then reflected in the Configuration file.

 -l: This option is used to send a logout request to the server. In case of Multiple
  Login mode this option requires argument i.e Username.

 -h: Provides help for the client.

 -d: Specify the location for log file.

 -v: Sets the verbose mode on. This option is for debugging purpose.

 -V: Provides Current Version information.

 -f: Specify the location for the configuration file.

Examples

 1. To login user with username ankit to 24online

 [root@manage crclient]# ./crclient -u ankit
 Server Address in dotted decimal format :: 10.104.1.178
 Password:
 save password(y/n)? y
 [root@manage crclient]#
 ./crclient:user 'ankit' successfully logged in to server '10.104.1.178'

 2. To logout user previously logged in

 [root@manage crclient]# ./crclient -l

Example of Configuration File

 AskonExit 0
 AutoLogin 0
 FirstTime 1
 Password
 Port 6060
 SavePassword 0
 Server 192.9.203.203
 User ankit
 ShowNotification 1
 LiveRequestTime 180
 AlreadyLoggedIn 0
 VersionId 1
 Version crclient1.1

 The configuration file includes the above showm parameters. First Configuration file is searched
 at /etc, if not found it is searched in the user's home directory. If the configuration file is
 not found at both the places a file is created in the user's home directory by accepting the
 essential parameters from the User.

NOTE :

i) User has to manually disable the SavePassword option in the configuration file by setting the
 value of SavePassword field to zero , once the option is enabled.

ii) Also, if the savepassword option is enabled and Password field is found to be null in the
 configuration file the user have to disable the savepassword option i.e by setting the
 SavePassword field to 0, inoder to login.

iii) If -f option is specified the full path along with the filename should be specified.
  Ex. /home/ankit/CyberClient.conf.

iv) In case of Sun Solaris the multiple process issue is vulnerable.No gaurantee is taken to
 control multiple client process invocation.

v) In case of '-d' option if log file cannot be opened at the specified location client exits.
 In absence of '-d' option preference for log location is
 1) '/var/log'
 2) Users home directory
 3) '/tmp'
 If all the three preferences fail logging will be done on standard output.

plz help asap.