Flex checkintests failed

I download flex sdk from http://opensource.adobe.com/svn/opensource/flex/sdk/trunk/. And tr开发者_StackOverflow中文版ied to build it by the instructions here http://opensource.adobe.com/wiki/display/flexsdk/Build+and+Test. Everything is OK, except tests. It failed with this error: Unexpected Trace: ... HTTP, 12029: /step_timeout Flex Error #1001: Digest mismatch with RSL file://D:/trunk/frameworks/testrs/basicTests/spark/views/framework_4.5.1.0.swf. Redeploy the matching RSL or relink your application with the matching library. test case RemoveUnusedRslsTest1&result=fail&msg=Timeout failed.

What I need to do to fix this failed and pass tests successful ?