Deploy error

Hi,

When i am trying to deploy and run my application it gives me below error.

The initial exception that caused the request to fail, was:

java.lang.NoClassDefFoundError: com/sap/mdm/net/ConnectionAccessor

at com.hzl.mdm.wdp.InternalVendorChkDuplicateView.<init>(InternalVendorChkDuplicateView.java:135)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)

at java.lang.reflect.Constructor.newInstance(Constructor.java:274)

... 34 more

Please help....