Problem accessing /config_general/null/Default.action Reason:There is no Action mapped for namespace/ config_general and action name default

in use:

vRO 5.1

eclipse 3.7.2

vRo plug-sdk 5.1

steps:

1.create a plug-in project from samples(choose solar system)

2.find the dar package and upload it by vRo configuration

3.vRo configuration said upload successfully,but the solar system configuration is not properly configued..

problem:

Problem accessing /config_general/null/Default.action   Reason:There is no Action mapped for namespace/ config_general and action name default

How to solve it??

Thanks so much!!