hi,
The CRM already have webservices that could be used to retrieve the data from CRM.
for CRM 4.0
http://technet.microsoft.com/en-us/library/cc151013.aspx
http://technet.microsoft.com/en-us/library/bb887784.aspx
http://technet.microsoft.com/en-us/library/bb890248.aspx
to use them from outside all you need is to have enable the IFD :
http://www.microsoft.com/downloads/en/details.aspx?FamilyID=3861E56D-B5ED-4F7F-B2FD-5A53BC71DAFC
once it is configured. you can use these web services.
If you still wish to use your own web services.
"when I try to add this webservice as Add web reference to my web application project it gave me permission error"
are you able to browse the same from your browser ?
if yes then download the WSDL and add that WSDL in your app as web reference, this will do the trick.
But I still prefer to use the available CRM web services instead of creating your own set of services.
hope this helps.
vishal swami
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