LOST INPUT COLUMN IN DATA FOUNDATION

Hi everyone.

I have create a data foundation base on relational connection .

1.if  i choose single datasource ,It lost the input column in the fountation.

2. if I choose multi datasource,It will  return a error when create  crystal report for enterprise  on the .UNX：

com.sap.connectivity.foundation.impl.Connection.getInstance(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljavax/xml/parsers/SAXParserFactory;)Lcom/sap/connectivity/foundation/impl/Connection; - [Internal Error ConnectionManagerL146]

here is my step：

create a relational connection on SAP R3 DRIVER  (JCO)   AND TEST SUCESSFULLY.

Create a data foundation on this connection .

If create a multi datasource  unx

apend two paramters link to the two input column .

can anyone tell the reason or the correctly step?