web services-Could not load file or assembly wsdl.exe or one of its dependencie.

Question

hello,

 I am developing a web service and to generate a proxy code for that webservies I used a command prompt of vs2005, so I got an error after excuting the below command.

c:\wsdl /namespace:authservice http://localhost/service.asmx
 
The Error is
 
Unhandled exception:system.badimageformatexception:Could not load file or assembly wsdl.exe or one of its dependencies. an attempt was made to load a programfile name:wsdl.exe