Two Transformations

For a Testing purpose I had the following scenario

Block 1

1) Receive step (Empno, Empname) Test_MI

2) Transformation ( Simple Transformation [Empno Concat Empno into Empno, Empname to Empname (Result)]

END Block 1

Block 2

3) Transformation (Result from previous step to New Output)

4) Send Step

Block 2

The above Test failed. The error was

CL_SWF_XI_MSG_BROKER method CALL_TRANSFORMATION cannot be executed

Its looks like the The result from a Transformation can't be used inthe following transaction as in input???

Any suggestions will be greatly appreciated.