Erro in CAF Application(Web Dynpro UI)

Hi All,

While I am creating a CAF UI using Web Dynpro I am getting the following run time error:

"It can't be determined from the exception chain, which class loader failed to load the above class. But at least the class loader of the current application does not contain a resource with name 'com/sap/tc/col/client/generic/api/IAspect'. "

com.sap.tc.webdynpro.services.exceptions.WDRuntimeException: Failed to create delegate for component sap.com.customer.CustomerComp.

can any one help me out in this regard.

Thanks,

Ramesh.