Hi Siva,
Looks like your soapUI project is not caching WSDLs. Select your project and make sure property Cache Definitions is set to false to true which will allow soapUI to used previously loaded (i.e. cached) versions of WSDLs when you load the project. Perhaps, this was turned off intentionally because WSDLs are being changed fairly frequently on your integration server.
Also, default behavior as far as WSDL caching is concerned is set in Preferences->WSDL Settings->Cache WSDLs.
Let me know if this has helped you.
Cheers!
/Nenad Nikolic a.k.a. Shonzilla